Consider the following statements regarding Rutherford's \(\alpha\)-ray scattering experiment.
i. Most of the \(\alpha\)-particles were deflected through a small angle.
ii. Some of \(\alpha\)-particles passed through the foil.
iii. Very few \(\alpha\)-particles were reflected back by 180^o.
Which of the above statements is/are not correct.

(a)

i and ii

(b)

ii and iii

(c)

i and iii

(d)

i, ii and iii

The element which does not contain a neutron is _____________

(a)

hydrogen

(b)

helium

(c)

chlorine

(d)

none of the above

Which of the following is named as perhydrol and used as an antiseptic?

(a)

D₂O

(b)

H₂O₂

(c)

NaH

(d)

B₂H₆

Which of the following is insoluble in water?

(a)

LiF

(b)

NaCI

(c)

KBr

(d)

NaBr

Which one of the following is more basic?

(a)

Ca(OH)₂

(b)

Mg(OH)₂

(c)

NaOH

(d)

AI(OH)₃

Which of the following is used as a coolant in fast breeder nuclear reactor?

(a)

Liquid ammonia

(b)

Liquid helium

(c)

Liquid Na metal

(d)

Solid CO₂

Which one of the following is used in fire extinguishers?

(a)

Washing soda

(b)

Soda ash

(c)

Baking soda

(d)

Caustic soda

The instrument used for measuring atmospheric pressure is ________________

(a)

Beckmann thermometer

(b)

Galvanometer

(c)

Barometer

(d)

all the above

The mathematical expression V\(\infty \) n relates to _____________

(a)

Boyle's law

(b)

Charles law

(c)

Avogadro's hypothesis

(d)

Gay Lusassc's law

Temperature at which gas behave ideally over a wide range of pressure is called as ____________

(a)

Inversion temperature

(b)

Boyle's temperature

(c)

Critical temperature

(d)

None of these

What is the dominant intermolecular force or bond that must be overcome in converting liquid methanol to a gas?

(a)

London dispersion force

(b)

Hydrogen bonding

(c)

Dipole-dipole interaction

(d)

Covalent bonds

Which mixture of gases at room temperature does not obey Dalton's law of partial pressure?

(a)

NO₂ and O₂

(b)

SO₂ and SO₃

(c)

CO and CO₂

(d)

NH₃ and HCI

Vanderwaal's constant a and b are related with  ______________ respectively

(a)

attractive force and volume of molecules.

(b)

repulsive force and volume of molecules

(c)

attractive force and bond energy of molecules.

(d)

shape and repulsive force of molecules

The liquefaction behaviour of temporary gases like CO₂ approaches that of N₂, O₂ (permanent gases) as we go _______

(a)

below critical temperature

(b)

above critical temperature

(c)

below absolute zero

(d)

above absolute zero

The density of neon will be highest at: ______.

(a)

STP

(b)

0°C, 2 atm

(c)

273°C, 1 atm

(d)

273°C, 2 atm

At constant temperature, the pressure of the gas is reduced to one-third, the volume ________.

(a)

reduce to one-third

(b)

increases by three times

(c)

remaining the same

(d)

cannot be predicted

Which of the following is a diatomic gas in nature?

(a)

Oxygen

(b)

Ozone

(c)

Helium

(d)

Radon

The standard atmospheric pressure at sea level at 0^oC is equal to _____________.

(a)

1 mm Hg

(b)

76 mm Hg

(c)

760 mm Hg

(d)

680 mm Hg

The value of critical temperature of carbon dioxide is _________.

(a)

273 K

(b)

303.98 K

(c)

373 K

(d)

-80^o C

The molecules of a gas A travel four times faster than the molecules of gas B at same temperature. The ratio of molecular weight M_A / M_B is _________.

(a)

1/16

(b)

4

(c)

1/4

(d)

16

When solid melts there is ____________

(a)

an increase of entropy

(b)

a decrease in entropy

(c)

an increase in free energy

(d)

an increase of heat of fusion

Which of these represents the correct order of their increasing bond order _________

(a)

C₂ < C₂ ^2- < O₂ ^2- < O₂

(b)

C ₂ ^2- < C₂ ⁺  < O₂ < O₂ ^2-

(c)

O₂ ^2- < O₂ < C₂ ^2-  < C ²⁺

(d)

O₂ ^2- < C₂ ⁺ < O₂ < C₂ ^2-

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

Assertion:  is 3– carbethoxy -2- butenoicacid
Reason: The principal functional group gets lowest number followed by double bond (or) triple bond.

(a)

both the assertion and reason are true and the reason is the correct explanation of assertion

(b)

both assertion and reason are true and the reason is not the correct explanation of assertion

(c)

assertion is true but reason is false

(d)

both the assertion and reason are false