The equivalent mass of a trivalent metal element is 9 g eq^-1 the molar mass of its an hydrous oxide is _____.

(a)

102 g

(b)

27 g

(c)

270 g

(d)

78 g

Splitting of spectral lines in an electric field is called _____________

(a)

Zeeman effect

(b)

Shielding effect

(c)

Compton effect

(d)

Stark effect

In which of the following options the order of arrangement does not agree with the variation of property indicated against it?

(a)

I< Br < CI < F (increasing electron gain enthalpy)

(b)

Li < Na < K < Rb (increasing metallic radius)

(c)

Al³⁺< Mg²⁺ < Na⁺ - (increasing ionic size)

(d)

B < C < O < N (increasing first ionisation enthalpy)

If a body of a fish contains 1.2 g hydrogen in its total body mass, if all the hydrogen is replaced with deuterium then the increase in body weight of the fish will be ______________

(a)

1.2 g

(b)

2.4 g

(c)

3.6 g

(d)

\(\sqrt{4.8}\)g

Find the wrong statement

(a)

sodium metal is used in organic qualitative analysis

(b)

sodium carbonate is soluble in water and it is used in inorganic qualitative analysis

(c)

potassium carbonate can be prepared by solvay process

(d)

potassium bicarbonate is acidic salt

The value of the gas constant R is ____________

(a)

0.082 dm³ atm.

(b)

0.987 cal mol^-1K^-1

(c)

8.3 J mol^-1 K^-1

(d)

8 erg mol^-1 K^-1

In a reversible process, the change in entropy of the universe is ________________

(a)

> 0

(b)

> 0

(c)

< 0

(d)

= 0

The values of ΔH and ΔS for a reaction are respectively 30 kJ mol^-1 and 100 JK^-1 mol^-1. Then the temperature above which the reaction will become spontaneous is ______________

(a)

300 K

(b)

30 K

(c)

100 K

(d)

200 C

The values of K_P1 and K_P2 for the reactions
X ⇌ Y + Z
A ⇌ 2B are in the ratio 9 : 1 if degree of dissociation and initial concentration of X and A be equal then total pressure at equilibrium P₁ and P₂ are in the ratio __________

(a)

36 : 1

(b)

1 : 1

(c)

3 : 1

(d)

1 : 9

The Henry's law constant for the solubility of Nitrogen gas in water at 350 K is 8 x 10⁴ atm. The mole fraction of nitrogen in air is 0.5. The number of moles of Nitrogen from air dissolved in 10 moles of water at 350K and 4 atm pressure is ____________

(a)

4 x 10^-4

(b)

4 x 10⁴

(c)

2 x 10^-2

(d)

2.5 x 10^-4

In which of the following Compounds does the central atom obey the octet rule ?

(a)

XeF₄

(b)

AlCl₃

(c)

SF₆

(d)

SCl₂

The IUPAC name of the Compound is _____________
 

(a)

2,3 - Diemethylheptane

(b)

3- Methyl -4- ethyloctane

(c)

5-ethyl -6-methyloctane

(d)

4-Ethyl -3 - methyloctane

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

Hyper Conjugation is also known as ___________.

(a)

no bond resonance

(b)

Baker - nathan effect

(c)

both (a)and (b)

(d)

none of these

Major product of the below mentioned reaction is _____________
\({ \left( { CH }_{ 3 } \right) }_{ 2 }C={ CH }_{ 2 }\overset { ICl }{ \longrightarrow } \)

(a)

2–chloro –1– iodo – 2 – methyl propane

(b)

1–chloro–2–iodo–2–methylpropane

(c)

1,2 – dichloro – 2 – methyl propane

(d)

1, 2 – diiodo – 2 – methyl propane

What do you understand by the term mole ?

Consider the following electronic arrangements for the d⁵ configuration.
(a)

\(\upharpoonleft \downharpoonright \)

\(\upharpoonleft \downharpoonright \)

\(​​\upharpoonleft \)

(b)

\(​​\upharpoonleft \)

\(​​\upharpoonleft \)

\(​​\upharpoonleft \)

\(\upharpoonleft \downharpoonright \)

(c)

\(​​\upharpoonleft \)

\(​​\upharpoonleft \)

\(​​\upharpoonleft \)

\(​​\upharpoonleft \)

\(​​\upharpoonleft \)

which configuration has the maximum exchange energy.

Give suitable explanation for the following facts about gases.
Gases diffuse through all the space available to them

Define the calorific value of food. What is the unit of calorific value?

If 5.6 g of KOH is present in
(a) 500 mL and
(b) 1 litre of solution 
Calculate the molarity of each of these solutions.

Write structural formula for the following compounds
Cyclohexa-1,4-diene  

Write short notes on Hyperconjucation.

Give IUPAC names for the following compounds
CH₃ – CH = CH – CH = CH – C ≡ C – CH₃

Draw cis-trans isomers for the following compounds
(a) 2- chloro – 2 – butene
(b) CH₃ – CH = CH – CH₂ – CH₃

Distinguish between oxidation and reduction.

How fast must a 54g tennis ball travel in order to have a de Broglie wavelength that is equal to that of a photon of green light 5400\(\overset { 0 }{ A } \) ?

A student reported the ionic radii of isoelectronic species X³⁺,Y²⁺ and Z^- as 136 pm,64 pm and 49 pm respectively.Is that oreder correct?Comment

Explain the exchange reactions of deuterium.

Why alkaline earth metals are harder than alkali metals.

Aerosol cans carry clear warning of heating of the can. Why?

Explain the following observation
The tyre of an automobile is inflated to slightly lesser pressure in summer than in winter

At 33K, N₂O₄ is fifty percent dissociated. Calculate the standard free energy change at this temperature and at one atmosphere

1 mol of PCl₅, kept in a closed container of volume 1 dm³ and was allowed to attain equilibrium at 423 K. Calculate the equilibrium composition of reaction mixture. (The K_c value for PCl₅ dissociation at 423 K is 2)

1. NH₃ has exceptionally high melting point and boiling point as compared to those of the hydrides of the remaining element of group 15. Explain.

2. Distinguish between diffusion and effusion.

1. List the characteristics of Gibbs free energy

2. When a mole of magnesium bromide is prepared from 1 mole of magnesium and 1 mele of liquid bromine, 524 kJ of energy is released.
   The heat of sublimation of Mg meta) is 148 kJ mol^-1, The heat of dissociation of bromine gas into atoms is 193 kJ mol^-1. The heat of vapourisation of liquid bromine is 31 kJ mol^-1. The ionisation energy of magnesium is 2187 kJ mol^-1 and the electron affinity of bromine is - 662 kJ mol^-1. Calculate the lattice energy of magnesium bromide.

1. Henry’s law constant for solubility of methane in benzene is 4.2 x 10^-5 mm Hg at a particular constant temperature At this temperature.
   Calculate the solubility of methane at
   i) 750 mm Hg
   ii) 840 mm Hg

2. 0.33 g of an organic compound containing phosphorous gave 0.397 g of Mg₂P₂O₇ by the analysis. Calculate the percentage of P in the compound.

1. Explain inductive effect with suitable example.

2. Differentiate the following
   (i) BOD and COD
   (ii) Viable and non-viable particulate pollutants

1. Balance the following equations by ion electron method
   \({ C }_{ 2 }{ O }_{ 4 }^{ 2- }+{ Cr }_{ 2 }{ O }_{ 7 }^{ 2- }\longrightarrow { Cr }^{ 3+ }+{ CO }_{ 2 }\) (in acid medium)

2. A temperature of about 3000°C is produced when Aluminium reduces ferric oxide and the reaction is given below. 2AI + Fe₂O₃ \(\rightarrow\) Al₂O₃ + 2Fe
   In one process 124g of aluminum reacted with 601 g of ferric oxide.
   (i) Calculate the mass of Al₂O₃ formed.
   (ii) How much of the excess reagent is left at the end of the reaction?