Action of Water on Calcium Carbide

Q. Which gas is produced by reaction of calcium carbide with water?

1. acetylene
2. methane
3. oxygen
4. hydrogen

Q. 2 Bromopropane is treated with alcoholic KoH solution .The major produvt formed in this reaction and the typeof reaction respectively are

Q. One mole of 1, 2-dibromopropane on treatment with X moles of $NaN{H}_2$ followed by treatment with ethyl bromide gave 2-pentyne. The value of X is:

1. one
2. two
3. three
4. four

Q. The compound formed when heavy water reacts with $Ca{C}_2$ is

1. Acetylene
2. Hydrogen
3. Deutero acetylene
4. Calcium hydroxide

Q. Which of the following salts undergoes anionic hydrolysis?

1. $CuS{O}_4$
2. $AlC{l}_3$
3. $N{H}_{4}Cl$
4. $K_{2}C{O}_3$
   
   

Q. Isopropyl bromide on Wurtz reaction gives

1. Propane
2. Neo-hexane
3. Hexane
4. 2, 3 – Dimethyl butane

Q.

Name the monomer of polythene.

Q. Iso butylene can be converted into tertiary butyl bromide by its reaction with 1. HBr 2.HBr in presence of peroxides 3.Br2

Q.

Give a balanced equation for the following conversation.

(1). Calcium sulphate in permanent hard water to calcium carbonate using sodium carbonate

Q.

Explain in brief the advantages and disadvantages of soft water and hard water

Q. A hydrocarbon $X\left(C_7{H}_{14}\right)$ on ozonolysis followed by work-up $Zn-H_{2}O$ gives $C_6{H}_{12}O$ as one of the product which on subsequent treatment with $KOH/I_2$ gives yellow precipitate and salt of a chiral acid. Hence, X could be

1. 
2. 
3. 
4. 

Q. Methylation of diborane gives (Me = methyl group)

1. 
2. 
3. 
4. 

Q. Which Product can be obtained in carbylamine reaction?

1. $C_6{H}_{5}N{H}_2$
2. $COC{l}_2$
3. $C_6{H}_{5}CN$
4. $C_6{H}_{5}NC$

Q. Isobutyraldehyde on reaction with formaldehyde and \(K_{2}CO_{3}\) gives compound \(A\). Compound \(A\) reacts with \(KCN\) and yields compound \(B\), which on hydrolysis gives a stable compound \(C\). The compond C is

Q.

How Do You Convert $\mathrm{Phenol}$ To $\mathrm{chlorobenzene}$?

Q. Dihydrogen can be prepared on commercial scale by different methods. In its preparation by the action of steam on hydrocarbons, a mixture of $CO$ and $H_2$gas is formed. It is known as

1. Syngas
2. Water gas
3. Industrial gas
4. Producer gas

Q.

Write a balanced chemical equation of Water is added to Calcium carbide

Q. The weight of BaCl2 that would react with 24.4g of sodium sulphate to produce 46.6g of barium sulphate and 23.4g of sodium chloride is ?

Q.

A metallic carbide on treatment with water gives a colourless gas which burns readily in air and which gives a precipitate with ammonical silver nitrate solution. Gas evolved is

1. Methane
2. Ethane
3. Acetylene
4. Ethylene

Q. Formation of acetylene from calcium acetylide can be represented as
$C{a}^{2+}C\equiv C^{2-}+2H_{2}O\to H-C\equiv C-H+2O{H}^{-}+C{a}^{2+}$

1. The weaker acid (acetylene) is displaced from its salt by a relatively stronger acid (water)
2. The weak acid (acetylene) is displaced from its salt by anothr weaker acid (water).
3. The weaker acid (acetylene) is displaced from its salt by neutral substance (water)
4. The stronger acid (acetylene) is displaced from its salt by a relatively weaker acid (water)

Q. From the list of alkenes given below, identify the alkenes which on reductive ozonolysis given only ketones.
(a) 2-methyl-1-butene
(b) 1-butene
(c) 2, 3-dimethyl-2-butene
(d) 3-methyl-2-pentene
(e) 3, 4-dimethyl-3-hexene
(f) 2, 5-dimethyl-2, 4-hexadiene

1. a, b and c
2. c and e only
3. d, e and f
4. c, d and e

Q. [X] as the major product among the elimination product is

1. 
2. 
3. 
4. 

Q.

Which of the following metal undergo spontaneous combustion?

1. Phosphorous

2. Calcium

3. Copper

4. lithium

Q.

The halogen which is most reactive in halogenations of alkene under sunlight is

1. Chlorine

2. Bromine

3. Iodine

4. all

Q.

Major product of the following reaction is

1. Butene-1
2. Butane-2
3. Butane
4. Butyne-1

Q. Hydrogen combines with Sulphur to form H2S and it combines with oxygen to form H2O, if Sulphur and oxygen combine together then they will do so in the ratio of A)32:16 B)1:1

Q. Choose the correct statement(s) :

1. $Ca{C}_2$ is formed by reacting $CaO$ with coke in presence of heat.
2. $Ca{C}_2$ is formed by reaaction of $Ca(OH{)}_2$ with $CO$ in presence of heat.
3. Ethyne can be prepared from $Ca{C}_2$ by reacting it with $H_{2}O$ in presence of heat
4. Vicinal dihalides on treatmentwith alcoholic KOH undergo dehydrohalogenation.

Q. Convert Ethanol to But-1-yne.

Q. Assertion A : Enol form of acetone $\left[C{H}_{3}COC{H}_3\right]$ exists in < 0.1% quantity. However, the enol form of acetyl acetone $\left[C{H}_{3}COC{H}_{2}OCC{H}_3\right]$ exists in approximately 15% quantity.

Reason R : Enol form of acetyl acetone is stabilized by intermolecular hydrogen bonding, which is not possible in enol form of acetone.

Choose the correct statement :

1. A is true but R is false
2. Both A and R are true and R is the correct explanation of A
3. A is false but R is true
4. Both A and R true but R is not the correct explanation of A

Q.

During the electrolysis of aqueous solution of sodium acetate, the nature of solution left in the vessel and its $P^H$ is

1. Neutral and 7

2. Basic and > 7

3. Acidic and < 7

4. Basic and < 7