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The number of moles of a gas in 1 $m^3$ of volume at N.T.P. is

The bottom of cooking vessels gets blackened when used on a gas/kerosene stove due to incomplete combustion of the fuel.

Nitrogen, phosphorus and sulphur are examples of

Why is direct sunlight not used in the preparation of hydrogen chloride gas?

The compound $C{H}_3-C{H}_2-O-C{H}_2-C{H}_3$ belongs to the family of

What is the meaning of Valency of group remain same as number of electrons in the outermost shell remains same

Classify the following :
1)$HCl$
2) $C{H}_{3}COOH$
3) $C{H}_{3}COONa$
4) Rubber
5) Common Salt
M- Strong Electrolyte N- Weak Electrolyte
O - Non-Electrolyte

Question 17

Paheli was feeling thirsty but there was only a pot of water at home which was muddy and unfit for drinking. How do you think Paheli would have made this water fit for drinking if the following materials were available to her.

Write the balanced chemical equations of the following reactions.

(a) Sodium hydroxide + sulphuric acid $\to$ sodium sulphate + water

(b) Potassium bicarbonate + sulphuric acid $\to$ potassium sulphate + carbon dioxide + water

(c) Iron + sulphuric acid $\to$ ferrous sulphate + hydrogen.

(d) Chlorine + sulphur dioxide + water $\to$ sulphuric acid + hydrogen chloride

(e) Silver nitrate $\to$ silver + nitrogen dioxide + oxygen

(f) Copper + nitric acid $\to$ copper nitrate + nitric oxide + water

(g) Ammonia + oxygen $\to$ nitric oxide + water

(h) Barium chloride + sulphuric acid $\to$ barium sulphate + hydrochloric acid

(i) Zinc sulphide + oxygen $\to$ zinc oxide + sulphur dioxide

(j) Aluminium carbide + water $\to$ aluminium hydroxide + methane

(k) Iron pyrites ($Fe{S}_2$) + oxygen $\to$ ferric oxide + sulphur dioxide

(l) Potassium permanganate + hydrochloric acid $\to$ potassium chloride + manganese chloride + chlorine + water

(m) Aluminium sulphate + sodium hydroxide $\to$ sodium sulphate + sodium meta aluminate + water.

(n) Aluminium + sodium hydroxide + water $\to$ sodium meta aluminate + hydrogen

(o) Potassium dichromate + sulphuric acid $\to$ potassium chloride + chromium chloride + water + chlorine.

(p) Sulphur + nitric acid $\to$ sulphuric acid + nitrogen dioxide + water.

(q) Sodium chloride + manganese dioxide + sulphuric acid $\to$ sodium hydrogen sulphate + manganese sulphate + water + chlorine.

A salt whose aqueous solution will have a pH of more than 7 will be :

(a) $K_{2}C{O}_3$

(b) $K_{2}S{O}_4$

(c) $NaCl$

(d) $N{H}_{4}Cl$

What is a “dust of snow”? What does the poet say has changed his mood? How has the poet’s mood changed?

The monomer of Teflon is:

State the disadvantages of using hard water.

Explain, why silver nitrate crystals are dissolved in distilled water and not in tap water to prepare silver nitrate solution as a laboratory reagent.

Give one chemical test to distinguish between dilute hydrochloric acid and dilute sulphuric acid.

Chlorine on reaction with hot and concentrated sodium hydroxide gives $X+Y+H_{2}O$ whereas chlorine on reaction with cold and dilute sodium hydroxide gives $X+Z+H_{2}O$. Compound $X$ is:

The process of zone refining is used in the purification of

What will you observe if hydrogen chloride gas is passed through blue litmus solution?

The correct general formula for alkanes is _______.

Write balanced equation for the reaction between dilute hydrochloric acid and sodium sulphite.

When a strong acid and a strong base are mixed, the heat released is maximum in the case of

Write a fully balanced equation for each of the following cases:

(a) Red lead is warmed with concentrated hydrochloric acid.

(b) Magnesium metal is treated with dilute hydrochloric acid.

Correct the following statement:

Equal masses of all gases under identical conditions contain the same number of molecules.

The pressure of a $1:4$ mixture by moles of dihydrogen and dioxygen enclosed in a vessel is $1$ bar. Calculate the partial pressure of dioxygen.

What is the primary compound used in the manufacturing of PVC?