One 'U' stands for the mass of ______________.

(a)

An atom of carbon-12

(b)

1/12^th of the carbon-12

(c)

1/12th of a hydrogen atom

(d)

One atom of any of the element

How many electrons in an atom with atomic number 105 can have (n + 1) = 8 ? 

(a)

30

(b)

17

(c)

15

(d)

unpredictable

Which of the following N^3-, O^2-, F^- is largest in size?

(a)

N^3-

(b)

O^2-

(c)

F^-

(d)

All of these

A commercial sample of hydrogen peroxide marked as 100 volume H₂O₂, it means that _____________

(a)

1 ml of H₂O₂ will give 100 ml O₂ at STP

(b)

1 L of H₂O₂ will give 100 ml O₂ at STP

(c)

1 L of H₂O₂ will give 22.4 L O₂

(d)

1 ml of H₂O₂  will give 1 mole of O₂ at STP

Which of the following statements is in correct ?

(a)

Li⁺ has minimum degree of hydration among alkali metal cations

(b)

The oxidation state of K in KO₂ is +1

(c)

Sodium is used to make Na / Pb alloy

(d)

MgSO₄ is readily soluble in water

A bottle of ammonia and a bottle of HCI connected through a long tube are opened simultaneously at both ends. The white ammonium chloride ring first formed will be ___________

(a)

At the center of the tube

(b)

Near the hydrogen chloride bottle

(c)

Near the ammonia bottle

(d)

Throughout the length of the tube

Molar heat of vapourization of a liquid is 4.8 kJ mol^-1. If the entropy change is 16 J mol ^-1 K^-1, the boiling point of the liquid is ____________

(a)

323 K

(b)

27° C

(c)

164 K

(d)

0.3 K

\(A+B\rightleftharpoons C+D,{ k }_{ c }\)for this reaction is 10. If c 1, 2, 3, 4 mole/litre of A, B, C and D respectively are present in a container at 25°C, the direction of reaction will be ____________

(a)

From left to right

(b)

From right to left

(c)

Reaction is at equilibrium

(d)

Unpredictable

Which of the following aqueous solutions has the highest boiling point ?

(a)

0.1 M KNO₃

(b)

0.1 M Na₃PO₄

(c)

0.1 BaCl₂

(d)

0.1 M K₂SO₄

In the formation of ethylene molecule, the carbon atom makes use of___________ hybridisation.

(a)

sp

(b)

Sp²

(c)

sp³

(d)

dsp²

Structure of the compound whose IUPAC name is 5,6 - dimethylhept - 2 - ene is ___________

(a)

(b)

(c)

(d)

None of these

Hyper Conjugation is also known as ___________.

(a)

no bond resonance

(b)

Baker - nathan effect

(c)

both (a)and (b)

(d)

none of these

How many structural isomers are possible for the molecular formula C₄H₈ which can undergo ozonolysis?

(a)

2

(b)

4

(c)

3

(d)

1

Which of the following does not form grignard reagent on reaction with Mg in the presence of ether?

(a)

Chloro ethane

(b)

1 - Chluro propane

(c)

Vinyl chloride.

(d)

Bromo benzene

Bhopal Gas Tragedy is a case of _____________.

(a)

thermal pollution

(b)

air pollution

(c)

nuclear pollution

(d)

land pollution

Calculate the equivalent masses of the following - HNO₃

The stabilisation of a half filled d - orbital is more pronounced than that of the p-orbital why?

Explain about the factors that affect electronegativity.

Mention the postulates of kinetic theory of gases which do not explain the behaviour of real gases.

For a gaseous homogeneous reaction at equilibrium, number of moles of products are greater than the number of moles of reactants. Is K_C is larger or smaller than K_P.

Indicate the \(\sigma\) and \(\pi\) bonds in the following molecules.
C₆H₆, CH₂CI₂, CH₃NO₂, CH₂ = C = CH₂

0.24g of an organic compound gave 0.287 g of silver chloride in the carius method. Calculate the percentage of chlorine in the compound.

When does the carbon in an alkene molecule acquires a positive charge ? Explain.

What happens when acetyl chloride is treated with excess of CH₃MgI?

How many moles of hydrogen is required to produce 10 moles of ammonia ?

Which of the following pairs of elements would have more negative electron gain enthalpy?
(i) O or F
(ii) For Cl.

How do you convert para hydrogen into ortho hydrogen?

A sample of gas has a volume of 8.5 dm³ at an unknown temperature. When the sample is submerged in ice water at 0 °C, its volume gets reduced to 6.37 dm³. What is its initial temperature ?

Give reason for the following statements. U is an extensive property

What is the mass of glucose (C₆ H₁₂O₆) in it one litre solution which is isotonic with 6 g L^-1 of urea (NH₂ CO NH₂) ?

Write about the main responsibility of the functional group in an organic compound.

Listout the uses of alkanes.

From where does ozone come in the photo chemical smog ?

1. Balance the following equation by ion electron method.
   Zn + NO₃^- ⟶ Zn + NH₄⁺²

2. Explain the following, give appropriate reasons.
   (i) Ionisation potential of N is greater than that of O.
   (ii) First ionisation potential of C-atom is greater than that of B atom, where as the reverse is true is for second ionisation potential.
   (iii) The electron affinity values of Be, Mg and noble gases are zero and those of N (0.02 eV) and P (0.80 eV) are very low.
   (iv) The formation of F-(g) from F(g) is exothermic while that of O^2-(g) from O (g) is endothermic.

1. Draw the hydrogen bonding existing following compounds.
   (i) Acetic acid
   (ii) Methanol water
   (iii) Ammonia in water 
   (iv) HF and (v) Water.

2. Describe briefly the biological Importance of Calcium and magnesium.

1. Give a detailed account on compressibility factor

2. Define the following terms
   (a) isothermal process (b) adiabatic process
   (c) isobaric process (d) isochoric process

1. The atmospheric oxidation of NO
   2NO(g) + O₂(g) ⇌ 2NO₂(g)
   was studied with initial pressure of 1 atm of NO and 1 atm of O₂. At equilibrium, partial pressure of oxygen is 0.52 atm calculate K_p of the reaction.

2. Explain crystallisation giving the different steps.

1. Explain the mechanism involved in bimolecular nucleophilic substitution reaction.

2. Mention the standards prescribed by BIS for quality of drinking water.