A body of mass \(m\) is taken from the earth's surface to the height \(h\) equal to the radius of the earth, the increase in potential energy will be:
1. \(mgR\)
2. \(\frac{1}{2}~mgR\)
3. \(2 ~mgR\)
4. \(\frac{1}{4}~mgR\)
A uniform tube is shown in the figure which is open at one end and closed at the other. To enclose a column of air inside the tube, a pellet of mercury is introduced. If the length of air column at 27°C is 18 cm, at what temperature its length will be 21.6 cm?
1. 87°C
2. 91°C
3. 85°C
4. 97°C
A stick of length L mass M initially upright on a frictionless floor, starts falling, then
1. Center of mass will fall vertically down
2. Centre of mass will follow a circular path
3. Centre of mass will follow any curve path
4. All of these
When fluids are heated from the bottom, convection currents are produced because -
(1) Molecular motion of fluid becomes aligned
(2) Molecular collisions take place within the fluid
(3) Heated fluid becomes more dense than the cold fluid above it
(4) Heated fluid becomes less dense than the cold fluid above it
1. | \(N=mg\) | 2. | \(N=2mg\) |
3. | \(N=3mg\) | 4. | \(N=5mg\) |
1. | 2. | ||
3. | 4. |
1. | zero | 2. | \(\dfrac{2u^2}{R}\) |
3. | \(\dfrac{u^2}{\sqrt2R}\) | 4. | \(\dfrac{\sqrt2u^2}{R}\) |
If the displacement equation of a particle be represented by , the particle executes
(1) A uniform circular motion
(2) A uniform elliptical motion
(3) A S.H.M.
(4) A rectilinear motion
A rod of mass \(M\) and length \(L\) is suspended vertically at its highest point. The rod is held so that it is horizontal and free to rotate about \(\text{A}\) and then released. There is no friction anywhere.
The force exerted by the hinge at \(\text{A}\), when the rod is at its lowest position is:
1. | \(2~Mg\) | 2. | \(3~Mg\) |
3. | \(4~Mg\) | 4. | \(2.5~Mg\) |
Volume-temperature graph at atmospheric pressure for a monoatomic gas is
1.
2.
3.
4.
The magnitude of the vector
\(\widehat i+\widehat i\times\widehat j+(\widehat i\times\widehat j)\times\widehat i+((\widehat i\times\widehat j)\times\widehat i)\times\widehat j\):
1. \(1\)
2. \(\sqrt2\)
3. \(\sqrt3\)
4. \(2\)
An object moves at a constant speed along a circular path in a horizontal \(XY\) plane with its centre at the origin. When the object is at \(x=-2~\text{m}\), its velocity is \(-(4~\text{m/s})\hat j\). What is the object's acceleration when it is at \(y = 2~\text{m}\)?
1. | \(-(8~\text{m/s}^2)\hat j\) | 2. | \(-(8~\text{m/s}^2)\hat i\) |
3. | \(-(4~\text{m/s}^2)\hat j\) | 4. | \(-(4~\text{m/s}^2)\hat i\) |
Which one of the following is not a vector quantity?
1. velocity
2. weight
3. electric charge
4. electric field
1. | \(1\) | 2. | \(2\) |
3. | \(2\pi\) | 4. | \(\frac1{2\pi}\) |
1. | \(\dfrac{1}{\sqrt x}\) | 2. | \(x^{3/2}\) |
3. | \(x^{-3/2}\) | 4. | \(x^0\) |
0.75 grams of a nitrogeneous compound is boiled with NaOH resulting in release of ammonia gas. The evolved ammonia is passed into 100 ml \(N\over 2\) H2SO4. The excess acid requires 90 ml \(N \over 3\)NaOH to neutralise. The percentage of nitrogen in the compound is:
1. 25
2. 37.33
3. 57.33
4. 75
1. | \(SO^{2-}_4\) | 2. | \(OH^-\) |
3. | \(HSO^-_4\) | 4. | \(Cl^-\) |
An aqueous solution of NaHSO3 is-
1. Acidic
2. Slightly alkaline
3. Alkaline
4. Slightly Acidic
What is the mass of precipitate formed when 50 mL of 16.9% solution of AgNO3 is mixed with 50 mL of 5.8% NaCl solution? (Ag = 107.8, N = 14, O = 16, Na= 23, Cl = 35.5)
1. 28 g
2. 3.5 g
3. 7 g
4. 14 g
The isostructural pairs among the following are:
A. | \( \mathrm{SO}_{4}^{2-} \ and \ \mathrm{CrO}_{4}^{2-}\) |
B. | \(\mathrm{SiCl}_{4} \ and \ \mathrm{TiCl}_{4}\) |
C. | \(\mathrm{NH}_{3} \ and \ \mathrm{NO}_{3}^{-} \) |
D. | \(\mathrm{BCl}_{3} \ and \ \mathrm{BrCl}_{3}\) |
1. C and D only
2. A and B only
3. A and C only
4. B and C only
Biochemical Oxygen Demand (BOD), is a measure of organic material present in water. BOD value less than 5 ppm indicates a water sample to be
1. Rich in dissolved oxygen
2. Poor in dissolved oxygen
3. Highly polluted
4. Not suitable for aquatic life
1. | The shapes of dxy, dyz, and dzx orbitals are similar to each other; and dx2 -y2 and dz2 are similar to each other. |
2. | All the five 5d orbitals are different in size when compared to the respective 4d orbitals. |
3. | All the five 4d orbitals have shapes similar to the respective 3d orbitals. |
4. | In an atom, all the five 3d orbitals are equal in energy in free state. |
The thermal stability of these hydrides decreases in which of the following orders?
(1) CsH > RbH > KH > NaH > LiH
(2) KH > NaH > LiH > CsH > RbH
(3) NaH > LiH > KH > RbH > CsH
(4) LiH > NaH > KH > RbH > CsH
In the given selective hydrogenation which combination is incorrect ?
1. (w.c. = wilkinsons catalyst)
2. (w.c. = wilkinsons catalyst)
3.
4.
The partial pressure of oxygen in a flask containing 16 g and 32 g is-
1. 1/16 of total pressure
2. 1/2 of total pressure
3. 2/3 of total pressure
4. None of the above
Which of the following statement regarding is wrong.
(1) It is stable in acid medium
(2) It acts as oxidising as well as reducing agent
(3) It has zero dipole moment
(4) Pure is slightly acidic
1. | Ga | 2. | In |
3. | Al | 4. | B |
Elements in the same group have similar physical and chemical properties due to the same:
1. Electronic configuration
2. Valence electrons
3. Atomic size
4. Atomic mass
Given below are pair of species. Which pair has the largest difference in sizes?
1. | Na and K | 2. | K and K+ |
3. | Cl and Cl- | 4. | Cl and Br |
1. | 1st shell | 2. | 2nd shell |
3. | 3rd shell | 4. | 4th shell |
List-I (Molecules) |
List-II (Shape) |
||
(a) | NH3 | (i) | Square pyramidal |
(b) | ClF3 | (ii) | Trigonal bipyramidal |
(c) | PCl5 | (iii) | Trigonal pyramidal |
(d) | BrF5 | (iv) | T-shape |
(a) | (b) | (c) | (d) | |
1. | (ii) | (iii) | (iv) | (i) |
2. | (iii) | (iv) | (ii) | (i) |
3. | (iv) | (iii) | (i) | (ii) |
4. | (iii) | (iv) | (i) | (ii) |
The mean free path of gas A, with molecular diameter equal to 4 Å, contained in a vessel, at a pressure of torr, is 6990 cm. The vessel is evacuated and then filled with gas B, with molecular diameter, equal to 2 Å, at a pressure of torr, the temperature remaining the same. The mean free path of gas B will be
(A) 28 cm
(B) 280 cm
(C) 7 cm
(D) 14 cm
The molarity of a solution obtained by mixing 750 mL of 0.5M HCl with 250 ml of 2M HCl will be:
1. 1.75 M
2. 0.975 M
3. 0.875 M
4. 1.00
I: | In a test cross, the allele the individual in question [one that expresses the dominant phenotype] passes on, determines the phenotype of the offspring. |
II: | The homozygous recessive individual can only pass on recessive alleles. |
1. | Both I and II are correct and II explains I |
2. | Both I and II are correct but II does not explain I |
3. | I is correct but II is incorrect |
4. | I is incorrect but II is correct |
Anthropogenic extinction is called
1. Fifth mass extinction
2. Fouth mass extinction
3. Sixth mass extinction
4. Seventh mass extinction
A | B | |
1. | T | T |
2. | T | F |
3. | F | T |
4. | F | F |
Which of the following ion is important for the activity of Pyruvate dehydrogenase?
(1) Zn++
(2) Mn+
(3) Mg++
(4) Ca++
Match each item in Column I with one item in Column II and choose the correct answer from the code given below:
A. Air [Prevention and Control of Pollution] Act | a. 1981 |
B. Water [Prevention and Control of Pollution] Act | b. 1974 |
C. Environment [Protection] Act | c. 1986 |
D. Montreal Protocol | d. 1987 |
Codes:
A. B. C. D.
1. a b c d
2. b a d c
3. d c b a
4. c d a b
The elements which are not actively mobilizable or immobilized within the plants. The deficiency symptom is observed in
(1) Both in young and old parts
(2) Only in young parts
(3) First in old parts
(4) First in young parts
Which of the following statement is incorrect?
1. The greater the BOD of waste water, more is its polluting potential
2. Baculoviruses are pathogens that attack several insects and plants
3. Trichoderma species are effective biocontrol agents of several plant pathogens
4. Sporeine was first bioinsecticide
1. | 7 | 2. | 14 |
3. | 21 | 4. | 28 |
A. | These are new species entering a geographical area. |
B. | They may cause the disappearance of the native species. |
C. | They have a huge impact on the world's highly threatened island ecosystem. |
D. | They are considered as the major cause of the extinction of the species. |
I: | Identifying all the genes that are expressed as RNA is referred to as Expressed Sequence Tags. |
II: | The blind approach of simply sequencing the whole set of genome that contained all the coding and non-coding sequence, and later assigning different regions in the sequence with functions is referred to as Sequence Annotation. |
Assertion: | The primary acceptor of carbon dioxide in C3 plants is a 2-carbon compound. |
Reason: | The first product of carbon dioxide fixation in these plants is a C3 acid. |
Assertion (A): | Inbreeding increases the chances of offspring being affected by recessive traits. |
Reason (R): | Inbreeding increases the proportion of homozygous individuals in a population. |
1. | Both (A) and (R) are True and (R) correctly explains the (A). |
2. | Both (A) and (R) are True but (R) does not correctly explain the (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
Column I | Column II | ||
A | Ribosome | P | Acid hydrolases |
B | Lysosome | Q | Protein synthesis |
C | Centrosome | R | Chromatin subunit |
D | Nucleosome | S | Cell division |
A | B | C | D | |
1. | Q | P | S | R |
2. | P | Q | R | S |
3. | P | Q | S | R |
4. | Q | P | R | S |
Match each item in Column I with one in Column II and select the correct match from the codes given:
Column I [Pteridophyte class] |
Column II [Example] |
||
A | Psilopsida | P | Psilotum |
B | Lycopsida | Q | Adiantum |
C | Sphenopsida | R | Selaginella |
D | Pteropsida | S | Equisetum |
A | B | C | D | |
1. | P | R | Q | S |
2. | P | R | S | Q |
3. | P | S | R | Q |
4. | Q | S | R | P |
Column I [Placentation] |
Column II [Example] |
||
A | Axile | P | Mustard |
B | Parietal | Q | Dianthus |
C | Free central | R | Lemon |
D | Basal | S | Marigold |
A | B | C | D | |
1. | R | P | Q | S |
2. | P | R | Q | S |
3. | P | Q | R | S |
4. | R | P | S | Q |
I: | each organism has only one name. |
II: | such a name has not been used for any other known organism. |
In the five kingdom classification, the members of Kingdom Animalia:
I: | are all heterotrophs |
II: | are all multicellular where cells lack a cell wall |
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
The cells of parenchyma are usually
(1) Diametric
(2) Isodiametric
(3) Pentagonal
(4) Orthorhombic
Which of the following is true about pituitary gland?
1. It is known as master gland
2. It is responsible for pigmentation of skin
3. It stimulates both milk synthesis and its ejection
4. All of the above
Statement A: | Evolution is a directed process in the sense of determinism. |
Statement B: | Evolution is a stochastic process based on chance events in nature and chance mutation in the organisms. |
Assertion (A): | Neurons are excitable cells. |
Reason (R): | The membrane of neurons is polarised. |
1. | Both (A) and (R) are True and (R) correctly explains the (A). |
2. | Both (A) and (R) are True but (R) does not correctly explain the (A). |
3. | (A) is True but (R) is False. |
4. | Both (A) and (R) are False. |
Column I [Blood type] |
Column II [Can receive blood from] |
||
A | A | P | A and O |
B | B | Q | Only O |
C | AB | R | A, B, AB and O |
D | O | S | B and O |
A | B | C | D | |
1. | S | P | Q | R |
2. | P | S | R | Q |
3. | P | Q | S | R |
4. | S | P | R | Q |
List I | List II |
A. Chitin | I. Polymer of fructose |
B. Lecithin | II. Protein |
C. Collagen | III. Polysaccharide |
D. Inulin | IV. Phospholipid |
1. | between the two light chains |
2. | between the two heavy chains |
3. | between the light and the heavy chains |
4. | at the very end of the antibody molecules [at their C terminus] |
Which of the following is not a synovial joint?
(1) Between axis and Atlas
(2) Between carpals
(3) Between vertebrae
(4) Metacarpal and carpal of thumb
The amount of CO2 that can diffuse through the diffusion membrane per unit difference in partial pressure is much higher as compared to that of O2. This is because:
1. | Solubility coefficient of CO2 is higher |
2. | Solubility coefficient of CO2 is lesser |
3. | Amount of gases in blood is independent of partial pressures of the gases in the atmosphere |
4. | Arterial blood contains more O2 than CO2 |
1. | Chromosomal DNA | 2. | Complementary DNA |
3. | F plasmid | 4. | Ti plasmid |
1. | LH by anterior pituitary | 2. | Inhibin by Sertoli cells |
3. | GnRH by hypothalamus | 4. | Androgens by Leydig cells |
1. | A= Water ; B=Carbohydrates ; C=Proteins ; D=Nucleic acids ; E=Lipids |
2. | A=Proteins ; B=Water ; C=Carbohydrates ; D=Lipids ; E=Nucleic acids |
3. | A=Water ; B=Proteins ; C=Nucleic acids ; D=Carbohydrates ; E=Lipids |
4. | A=Proteins ; B=Carbohydrates ; C=Nucleic acids ;D=Lipids E=Nucleic |
1. | RBCs contain a very high concentration of the enzyme. |
2. | It is not present at all in the plasma. |
3. | It assists rapid inter-conversion of carbon dioxide and water into carbonic acid, protons and bicarbonate ions. |
4. | The active site of the enzyme contains a zinc ion. |
Column I | Column II | ||
A | Cephalochordata | P | Swim bladder |
B | Cyclostomata | Q | Notochord – head to tail |
C | Chondrichthyes | R | Males bear claspers on pelvic fins |
D | Osteichthyes | S | Marine but migrate to freshwater for spawning |
A | B | C | D | |
1. | S | Q | P | R |
2. | P | Q | R | S |
3. | Q | S | R | P |
4. | R | P | S | Q |
Statement I: | When swallowing, the soft palate would have to move downward in order to prevent food from entering the lungs. |
Statement II: | When swallowing the epiglottis allows the food to enter the larynx. |
1. | an Rh positive mother is carrying an Rh negative foetus |
2. | an Rh negative mother is carrying an Rh positive foetus |
3. | an Rh positive mother is carrying an Rh positive foetus |
4. | an Rh negative mother is carrying an Rh negative foetus |
Which of the following is false?
(1) Adipose tissue is located mainly below skin
(2) Tendon consists of white fibrous tissue
(3) Tendon connects a bone with another bone
(4) Ligaments connect a bone with another bone