40 ml of methane is completely burnt using 80 ml of oxygen at room temperature The volume of gas left after cooling to room temperature is _______.

(a)

40 ml CO₂ gas

(b)

40 ml CO₂ gas and 80 ml H₂O gas

(c)

60 ml CO₂ gas and 60 ml H₂O gas

(d)

120 ml CO₂ gas

Two electrons occupying the same orbital are distinguished by ___________

(a)

azimuthal quantum number

(b)

spin quantum number

(c)

magnetic quantum number

(d)

 orbital quantum number

Law of triad was unable to explain for the element

(a)

Ca, Sr and Ba

(b)

Fe, Co, Ni

(c)

Li, Na, K

(d)

CI, Br, I

Heavy water is used as _________

(a)

moderator in nuclear reactions

(b)

coolant in nuclear reactions

(c)

both (a) and (b)

(d)

none of these

The suspension of slaked lime in water is known as ___________

(a)

lime water

(b)

quick lime

(c)

milk of lime

(d)

aqueous solution of slaked lime

The ideal gas equation is ____________.

(a)

PV = RT for 1 mole

(b)

P₁V₁ = P₂V₂

(c)

\(\frac{P}{T}=R\)

(d)

P = P₁ + P₂ + P₃

An ideal gas expands from the volume of 1 x 10^-3 m³ to 1 x 10^-2 m³ at 300 K against a constant pressure at 1 x 10⁵ Nm^-2. The work done is ______________

(a)

- 900 J

(b)

900 kJ

(c)

270 kJ

(d)

-900 kJ

Solubility of carbon dioxide gas in cold water can be increased by ____________

(a)

increase in pressure

(b)

decrease in pressure

(c)

increase in volume

(d)

none of these

The K_H for the solution of oxygen dissolved in water is 4\(\times\)10⁴ atm at a given temperature. If the partial pressure of oxygen in air is 0.4 atm, the mole fraction of oxygen in solution is ________

(a)

4.6\(\times\)10³

(b)

1.6\(\times\)10⁴

(c)

1\(\times\)10^-5

(d)

1\(\times\)10⁵

Which one of the following names does not fit a real name?

(a)

3 – Methyl –3–hexanone

(b)

4–Methyl –3– hexanone

(c)

3– Methyl –3– hexanol

(d)

2– Methyl cyclo hexanone

Identify the colour formed in the test for phosphorous using ammonium molybdate.

(a)

Crimson red colour

(b)

Deep violet colour

(c)

Prussian blue colour

(d)

Canary yellow colour

The geometrical shape of carbocation is ______________.

(a)

Linear

(b)

tetrahedral

(c)

Planar

(d)

Pyramidal

Peroxide effect (Kharasch effect) can be studied in case of ___________

(a)

Oct – 4 – ene

(b)

hex – 3 – ene

(c)

pent – 1 – ene

(d)

but – 2 – ene

Which of the following is the most stable cycloalkane?

(a)

(b)

(c)

(d)

Which of the following compounds will give racemic mixture on nucleophilic substitution by OH- ion?

(a)

(i)

(b)

(ii) and (iii)

(c)

(iii)

(d)

(i) and (ii)

Calculate the molar mass of the following compounds.
Acetone [CH₃ COCH₃]

After the execution of the \(\alpha\)-ray scattering experiment, what were the observations made by Rutherford? What did he conclude from his observations?

Name the first and the last elements in the following periods (n) .
(i) n=:4
(ii) n = 5
(iii) n = 6
(iv) n = 7

Write short notes on Deuterium.

Why alkaline earth metals are harder than alkali metals.

Distinguish between diffusion and effusion.

Explain intensive properties with two examples

A 0.25 M glucose solution at 370.28 K has approximately the pressure as blood does what is the osmotic pressure of blood ?

What is Grignard reagent? How is it prepared from ethyl bromide?

How much volume of chlorine is required to form 11.2 L of HCI at 273 K and 1 atm pressure?

Using Aufbau principle, write the ground state electronic configuration of following atoms.
(i) Boron (Z = 5)
(ii) Neon (Z = 10)
(iii) Aluminium (Z = 13)
(iv) Chlorine (Z = 17)
(v) Calcium (Z = 20)
(vi) Rubidium (Z = 37)

Noble gases have maximum ionisation energy. Justify.

Why sodium hydroxide is much more water soluble than chloride ?

Would it be easier to drink water with a straw on the top of Mount Everest?

Identify processes under the following conditions
(i) dT = 0
(ii) dP = 0
(iii) dV = 0

The value of Kc for the reaction
N₂O₂(g) \(\rightleftharpoons \) 2NO₂(g)

0.16 g of an organic compound was heated in a carius tube and H₂SO₄ acid formed was precipitated with BaCl₂. The mass of BaSO₄ was 0.35g. Find the percentage of sulphur [30.04]

Write the equations for the preparation of l-iodobutane from.

1. Explain electron movement in organic reactions.

2. What happens when propene is treated with the following.
   (i) H₂SO₄
   (ii) Ozone
   (iii) HBr
   (iv) Red hot Fe tube
   (v) Acidified KMnO₄

1. Suggest and explain an indirect method to calculate lattice enthalpy of sodium chloride crystal

2. Explain the nature of non - ideal solution with positive deviation from Raoult,s law.

1. Dihydrogen reacts with dioxygen (O₂) to form water. Write the name and formula of the product when the isotope of hydrogen which has one proton and one neutron in its nucleus is treated with oxygen. Will the reactivity of both the isotopes be the same towards oxygen? Justify your answer.

2. In an experimant of verification of Charle's law, the following are the set of readings taken by a student

   Experiment	Volume (L)	Temperature (°C)
   1	1.54	20
   2	1.65	40
   3	1.95	100
   4	2.07	120

   What is the average value of the constant of proportionality?

1. By using paulings method calculate the ionic radii of K⁺ and CI^- ions in the potassium chloride crystal. Given that dk⁺-cl^-=3.14 Å. 

2. Give the uses of gypsum.

1. A laboratory analysis of an organic compound gives the following mass percentage composition: C = 60%, H = 4.48% and remaining oxygen.

2. What is the de Broglie wavelength (in cm) of a 160 g cricket ball travelling at 140 Km hr ^-1.