Polyhalogen Compounds

Q.

Calculate the standard enthalpy of formation of CH₃OH_(l) from the following data:

CH₃OH_(l) + O_2(g) CO_2(g) + 2H₂O_(l) ; Δ_rH^θ = –726 kJ mol^–1

C_(g) + O_2(g) CO_2(g) ; Δ_cH^θ = –393 kJ mol^–1

H_2(g) +O_2(g) H₂O_(l) ; Δ_fH^θ = –286 kJ mol^–1.

Q. Haber’s Process is used for the preparation of:

1. $NO$
2. $HN{O}_3$
3. $N{H}_3$
4. $H_{2}S{O}_4$

Q.

Give full form of BHC.

Q. Why toluene is more reactive towards electrophilic substitution

Q.

For the reaction at 298 K,

2A + B → C

ΔH = 400 kJ mol^–1 and ΔS = 0.2 kJ K^–1 mol^–1

At what temperature will the reaction become spontaneous considering ΔH and ΔS to be constant over the temperature range?

Q. What is the hybridization of sulphur in sulphuric acid?

1. $sp$
2. $s{p}^2$
3. $s{p}^3$
4. No hybridization

Q.

Write information on carbon compounds in daily use?

Q.

What Is The Difference Between Efflorescence And Deliquescence?

Q.

Which reaction follows inversion of configuration SN1 or SN2?

Q. 2-Pentanone can be distinguished from 3- pentanone by which of the reagents below?

1. 2, 4-Dinitrophenyl hydrazine
2. Tollen's reagent
3. $I_2$ and dilute $NaOH$
4. $H_{2}NOH$

Q.

Major products obtained when n-hexane is heated in the presence of anhydrous$\mathrm{AlCl}3$ and $\mathrm{HCl}$gas are

Q. Identify the electrophilic centre in CH3CHO

Q.

Carbyl amine test is performed in alcoholic KOH by heating a mixture of

1. Chloroform with silver powder

2. Trihalogenated methane and a primary amine

3. An alkyl halide and primary amine

4. An alkyl cyanide and a primary amine

Q.

Reduction of nitro alkanes yields

1. Acid

2. Alcohol

3. Amine

4. Diazo compounds

Q.

What is the correct formula of $\text{Freon}-12$?

Q. 2H2 + O2 → 2H2O If 2 g of Hydrogen and 5 g of Oxygen is used in the following reaction, what is the limiting reagent?

Q.

Manganese in toxic concentrations leads to the deficiency of ______.

Q.

. Name any one compound that decomposes on heating to release oxygen.

Q. Which of the following is used as an antiseptic for eyes?

1. Iodoform
2. Tincture of iodine
3. Dettol
4. Boric acid

Q. Which of the following is the correct structure of D.D.T.?

1. 
2. 
3. 
4. 

Q.

Which of the following is the example of SN² reaction

[CPMT 1999]

1. 

2. 

3. 

4. 

Q.

What is gas carbon.

Q. How does phenol react with ammonium ceric nitrate

Q.

Ethyl bromide can be converted into ethyl alcohol by

[KCET 1989]

1. Heating with dilute hydrochloric acid and zinc

2. Boiling with an alcoholic solution of KOH

3. The action of moist silver oxide

4. Refluxing methanol

Q. Which of the following does not form dichlorides and dibromides

1. Oxygen
2. Sulphur
3. Selenium
4. Tellurium

Q. For the reaction 3A ---->B+C k is 10^-4L/molmin if [A]=0.5M then the value of -d[A]/dt is

Q.

In the above reaction, X stands for

1. An oxidant

2. A reductant

3. Light and air

4. None of these

Q.

Sir is it enough to read inorganic part from ncert to tackle questions appearing in jee mains

Q.

Give reason for the following

Ammonia is un-ionised in the gaseous state but in the aqueous solution is a weak electrolyte.

Q. 3. Name the gas that can readily decolourise acidified KMnO4 solution:- 1)NO2 2)P2O5 3)CO2 4)SO2