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Match the following.

A) A:V, B: IV, C:II, D:I

B) A:III, B:IV, C:V,D:II

C) A:IV, B:III, C:II, D:I

D) A:III, B:I, C:V, D:II

How many of the following species are diamagnetic?

$He_{2}^{+}, H_{2}^{+}, H_{2}^{-}, He$

A) 1

B) 2

C) 3

D) 0

Identify the oxidation states of Mn, when $MnO_{4}^{2-}$ ion undergoes disproportionation reaction under acidic medium

A) +2,+7

B) +2,+5

C) +4,+4

D) +7,+4

For the reaction ,

$0.5 C(s)+0.5 CO_{2}(g)\rightleftharpoons CO(g)$

the equilibrium pressure is 12 atm . If CO₂ conversion is 50% the value of K_p, in atm is

A) 4

B) 1

C) 0.5

D) 2

Which of the following products are formed on hydrolysis of $NaO_{2}$ ?

(A) NaOH (B) $H_{2}O_{2}$ (C) $O_{2}$ (D) $H_{2}O$

A) A,D

B) A, C, D

C) A, B, D

D) A, B, C

$\triangle H^{0}_{f}$ values (in $kJ mol ^{1}$ ) for graphite , diamond and $C_{60}$ are respectively

A) 0;1.9;38.1

B) 1.8;1.9;38.1

C) 0;0;21.4

D) 1.8;1.9;2.0

How many of the following compounds show ferrimagnetism?

$Fe_{3}O_{4};MgFe_{2}O_{4};NiFe_{2}O_{4};MnO;CrO_{2}$

A) 1

B) 2

C) 3

D) 4

How many ions of the following have bond order of 2.5?

$N_{2}^{-},NO^{-}, C_{2}^{-}, N_{2}^{+}, C_{2}^{2-}, CN^{+}$

A) 4

B) 3

C) 2

D) 5

Match the following

THe correct statement is

A) A:IV,B:III,C:I,D:II

B) A:III,B:I, C:IV,D:II

C) A:IV,B:I,C:III,D:II

D) A:II,B:I,C:IV,D:III

The compound that does not undergo haloform reaction is

$CH_{3}CHO$

$CH_{3}CH_{2}OH$

$CH_{3}COCH_{3}$

$C_{2}H_{5}COCH_{2}CH_{3}$

The enthalpy change for freezing of 1 g of water at 1 bar and $0^{0}$ C is 334 J . Calculate the internal energy change in J when 1g of water is converted into ice?

A) 205

B) 334

C) 0

D) 668

Statement (A) Mg can reduce $Al_{2}O_{3}$ above $1350^{0} C$

Statement (B) Al can reduce MgO below $1350^{0} C$

The correct answer is

A) Both (A) and (B) are wrong

B) (A) is correct, but (B) is wrong

C) (A) is wrong , but (B) `is correct

D) Both (A) and (B)are correct

Identify the correct order of ionic radii of the following ions.

$Al^{3+} > K^{+} > Mg^{2+}> Li^{+}$

$K^{+} >Mg^{2+} > Al^{3+} > Li^{+}$

$K^{+} > Li^{+} >Mg^{2+}>Al^{3+}$

$K^{+} > Mg ^{2+} >Li^{+} > Al^{3+}$

The vapour pressure of pure $CCl_{4}$ (molar mass=154 g mol^-1) and $SnCl_{4}$ (molar mass=170 g mol^-1) at $25^{0} C$ are 115.0 and 238.0 torr respectively . Assuming ideal behaviour , calculate the total approximate vapour pressure in torr of a solution containing 10 g of $CCl_{4}$ and 15 g of $SnCl_{4}$ .

A) 185.85

B) 190.0

C) 180.7

D) 182.1

The first-order decomposition of $H_{2}O_{2}$ in an appropriate medium is characterised by a rate constant of 0.2303 min^-1 . What is the time (in min) required to complete 9/10 fraction of the reaction?

A) 0.1

B) 10

C) 100

D) 0.01

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