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1. For Young's double-slit experiment, two statements are given below:

Statement I:	If screen is moved away from the plane of slits, angular separation of the fringes remains constant.
Statement Ii:	If the monochromatic source is replaced by another monochromatic source of larger wavelength, the angular separation of fringes decreases.

 

1.	Statement I is False but Statement II is True.
2.	Both Statement I and Statement II are True.
3.	Both Statement I and Statement II are False.
4.	Statement I is True but Statement II is False.

2. The escape velocity of a body on the earth's surface is \(11.2~\text{km/s}.\) If the same body is projected upward with a velocity \(22.4~\text{km/s},\) the velocity of this body at an infinite distance from the centre of the earth will be:

1.	\(11.2\sqrt2~\text{km/s}\)	2.	zero
3.	\(11.2~\text{km/s}\)	4.	\(11.2\sqrt3~\text{km/s}\)

3. The minimum wavelength of X-rays produced by an electron accelerated through a potential difference of \(V\) volts is proportional to:
1. \(V^2\)
2. \(\sqrt{V}\)
3. \(1/V\)
4. \(\frac{1}{\sqrt{V}}\)

4. An AC source is connected to a capacitor \(C\). Due to decrease in its operating frequency:

1.	capacitive reactance remains constant
2.	capacitive reactance decreases.
3.	displacement current increases.
4.	displacement current decreases.

5. In the figure shown here, what is the equivalent focal length of the combination of lenses?
(Assume that all layers are thin)

 

1.	\(-50~\text{cm}\)	2.	\(40~\text{cm}\)
3.	\(-40~\text{cm}\)	4.	\(-100~\text{cm}\)

6. For very high frequencies, the effective impedance of the circuit (shown in the figure) will be: 

1.	\(4~ \Omega\)	2.	\(6~ \Omega\)
3.	\(1~ \Omega\)	4.	\(3~ \Omega\)

7.     
The above figure shows the circuit symbol of a transistor. Select the correct statements given below:

(A)	The transistor has two segments of p-type semiconductor separated by a segment of n-type semiconductor.
(B)	The emitter is of moderate size and heavily doped.
(C)	The central segment is thin and lightly doped.
(D)	The emitter base junction is reverse biased in common emitter amplifier circuit.

 

1.	(C) and (D)
2.	(A) and (D)
3.	(A) and (B)
4.	(B) and (C)

8.

Assertion (A):	Ionization enthalpy increases along each series of transition elements from left to right. However, small variations occur.
Reason (R):	There is a corresponding increase in nuclear charge which accompanies the filling of electrons in the inner d-orbitals.

 

1.	(A) is True but (R) is False
2.	(A) is False but (R) is True
3.	Both (A) and (R) are True and (R) is the correct explanation of (A)
4.	Both (A) and (R) are True but (R) is not the correct explanation of (A)

9. Given below are two statements:

Assertion (A):	A reaction can have zero activation energy.
Reason (R):	The minimum amount of energy required by reactant molecules so that their energy becomes equal to threshold value, is called activation energy.

 

1.	(A) is False but (R) is True.
2.	Both (A) and (R) are True and (R) is the correct explanation of (A)
3.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
4.	(A) is True but (R) is False.

10. Given below are two statements: 

Statement I:	A unit formed by the attachment of a base to 1' position of sugar is known as a nucleoside.
Statement II:	When nucleoside is linked to a phosphorous acid at 5' position of sugar moiety, we get nucleotide.

In the light of the above statements choose the correct answer from the options given below:

1.	Statement I is false but Statement II is true.
2.	Both Statement I and Statement II are true.
3.	Both Statement I and Statement II are false.
4.	Statement I is true but Statement II is false.

11. Given below are two statements: 

Assertion (A):	Ionisation enthalpies of early actinoids are lower than early lanthanoids.
Reason (R):	Electrons entering 5f orbitals in actinoids experience greater shielding from the nuclear charge.

 

1.	Both (A) and (R) are True and (R) is the correct explanation of (A).
2.	Both (A) and (R) are True but (R) is not the correct explanation of (A).
3.	(A) is True but (R) is False.
4.	(A) is False but (R) is True.

12. Which of the following pair is correctly matched?
1. Basic oxides - \(\mathrm{In_2O_3 , K_2O , SnO_2}\)
2. Neutral oxides - \(\mathrm{CO, NO_2, N_2O}\)
3. Acidic oxides - \(\mathrm{Mn_2O_7, SO_2, TeO_3}\)
4. Amphoteric oxides -\(\mathrm{BeO , Ga_2O_3 , GeO }\)

13. Given below are two statements:

Statement I:	Hydrated chlorides and bromides of Ca, Sr and Ba on heating undergo hydrolysis.
Statement II:	Hydrated chlorides and bromides of Be and Mg on heating dehydration.

In the light of the above statements, choose the correct answer from the options given below:
1. Statement I is correct but Statement II is incorrect.
2. Statement I is incorrect but Statement II is correct.
3. Both Statement I and Statement II are correct.
4. Both Statement I and Statement II are incorrect.

14.

15. Consider the given reaction: 
\(\mathrm{CH}_3 \mathrm{COCH}_3 \stackrel{\mathrm{dil.~Ba}\left(\mathrm{OH)}_2\right.}{\longrightarrow} \text { " } \mathrm{X} "\)
The functional groups present in the compound "X" are: 
1. Ketone and double bond 
2. Double bond and aldehyde 
3. Alcohol and aldehyde 
4. Alcohol and ketone 

16. Which of the following is the correct sequence of reagents for converting 4-nitrotoluene to 2-bromotoluene?

1.	NaNO2/HCl; Sn/HCl; Br2; H2O/H3PO2
2.	Sn/HCl; NaNO2/HCl; Br2; H2O/H3PO2
3.	Br2; Sn/HCl; NaNO2/HCl; H2O/H3PO2
4.	Sn/HCl; Br2; NaNO2/HCl; H2O/H3PO2

17. The least basic compounds/species among the following is:

1.		2.
3.		4.

18. Consider the following reactions:
\({R-COOH\xrightarrow[(ii)~H_2O/HCl]{(i)~X}R-CH_2OH }\)
\(\small{R-CH=CH_2\xrightarrow[(ii)~H_2O/ NaOH/ H_2O_2]{(i)~X}R-CH_2-CH_2-OH}\)
Identify 'X' in above reactions: 

1.	\(B_2H_6 \)	2.	\(LiAlH_4 \)
3.	\(NaBH_4 \)	4.	\(H_2/Pd \)

19. The reaction that does not take place in a blast furnace between 900 K to 1500 K temperature range during the extraction of iron is: 
1. CaO + SiO₂ → CaSiO₃ 
2. Fe₂O₃ + CO → 2FeO + CO₂ 
3. FeO + CO → Fe +CO₂ 
4. C + CO₂ → 2CO

20. A certain plant homozygous for yellow seeds and red flowers was crossed with a plant homozygous for green seeds and white flowers. The F₁ plants had yellow seeds and pink flowers. The F₁ plants were selfed to get F₂ progeny. Assuming independent assortment of the two characters, how many phenotypic categories are expected for these characters in the F₂ generation?

1.	9	2.	16
3.	4	4.	6

21. Doubling of the number of chromosomes can be achieved by disrupting mitotic cell division soon after:

1.	Anaphase	2.	Telophase
3.	Prophase	4.	Metaphase

22. There are 250 snails in a pond and within a year their number increases to 2500 by reproduction. What should be their birth rate (in per snail per year)?

1.	10	2.	9
3.	25	4.	15

23. Which one of the following is not an advantage of inbreeding?

1.	It decreases the productivity of inbred population, after continuous inbreeding.
2.	It decreases homozygosity.
3.	It exposes harmful recessive genes that are eliminated by selection.
4.	Elimination of less desirable genes and accumulation of superior genes takes place due to it.

24. Match List - I with List - II

	List-I		List-II
(A)	Terpenoids	(I)	Vinblastin
(B)	Lectins	(II)	Diterpenes
(C)	Drug	(III)	Ricin
(D)	Toxin	(IV)	Concanavalin A

Choose the correct answer from the options given below:

Options:	(A)	(B)	(C)	(D)
1.	II	IV	III	I
2.	II	I	IV	III
3.	II	III	I	IV
4.	II	IV	I	III

25. Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R)

Assertion (A):	Ascending limb of the loop of Henle is impermeable to water and allows transport of electrolytes actively or passively.
Reason (R):	Dilution of filtrate takes place due to efflux of electrolytes in the medullary fluid

In light of the above statements, choose the correct answer from the options given below:

1.	(A) is True, (R) is False
2.	(A) is False, (R) is True
3.	Both (A) and (R) are True and (R) is the correct explanation of (A)
4.	Both (A) and (R) are True but (R) is not the correct explanation of (A)