Explore topic-wise InterviewSolutions in .

The percentage composition of sodium phosphate as determined by analysis is 42.1% sodium, 18.9% phosphorus and 39% oxygen.

Find the empirical formula of the compound (work to up to two decimal places). [Na = 23,P = 31,O = 16]

Salts are prepared by the following methods

(a) Direct combination

(b) Displacement

(c) Double decomposition (precipitation)

(d) Neutralisation of insoluble base

(e) Neutralisation of an alkali (titration)

Calculate the mole fraction, molality and molarity of HnO3 in solution containing 12.2% HnO3.Density of HnO3 is 1.038 gram cm^-3.

Which of the following pair of metals exists in their native state in nature?
(a) Ag and Hg (b) Ag and Zn (c) Au and Hg (d) Au and Ag

The metal which is always present in an amalgam is:
(a) iron (b) aluminium (c) mercury (d) magnesium

The element which forms a basic oxide has the atomic number of :

(a) 18 (b) 17 (c) 14 (d) 19

During the electrolysis of acidified water, the substance liberated at the cathode is

How to complete the Equations.

Mg + CH₂(COOH)_{2 --------- _____________ + __________}

A Ltd issued 4,000, 9% Debentures of Rs.100 each on the following terms.

Rs.10 on Application

Rs.20 on Allotment

Rs.30 on First call

Rs.30 on Final call

The public applied for 4,800 Debentures, Applications for 3,600 Debentures were accepted in full. Applications for 800 Debentures were allotted 400 debentures and applications for 400 Debentures were rejected.

Aqueous copper sulphate solution (blue in colour) gives:
a green precipitate with aqueous potassium fluoride.

a bright green solution with aqueous potassium chloride.
Explain these experimental results.

How does the pH change when the solution of base is diluted with water? [2 MARKS]

Which of the following statement is incorrect about anions?

Which one of the following is the weakest acid?

Gas enclosed in 2 liters vessel is subjected to the pressure of 2 atm at an isothermal condition. What will be the resulting pressure of the gas if we increase the volume of the vessel to 4 liters?

Mr. Girdhari Lal does not keep full double entry records. His balance as on January 01, 2006 is as follows:

$\begin{array}{cccc}\text{Liabilities}& \text{Amt. (Rs.)}& \text{Assets}& \text{Amt. (Rs.)}\\ \text{Sundry Creditors}& 35,000& \text{Cash in hand}& 5,000\\ \text{Bills Payable}& 15,000& \text{Cash at bank}& 20,000\\ \text{Capital}& 40,000& \text{Sundry debtors}& 18,000\\ & & \text{Stock}& 22,000\\ & & \text{Furniture}& 8,000\\ & & \text{Plant}& 17,000\\ & \overline{\underset{–}{\underset{–}{90,000}}}& & \overline{\underset{–}{\underset{–}{90,000}}}\end{array}$

His position at the end of the year is -

$\begin{array}{cc}& \text{(Rs.)}\\ \text{Cash in Hand}& 7,000\\ \text{Stock}& 8,600\\ \text{Debtors}& 23,800\\ \text{Furniture}& 15,000\\ \text{Plant}& 20,350\\ \text{Bills Payable}& 20,200\\ \text{Creditors}& 15,000\end{array}$

He withdrew Rs. 500 per month out of which he spent Rs. 1,500 for business purpose.
Prepare the statement of profit or loss.

Define the following and give two examples in each case : (a) a normal salt, (b) an acid salt, (c) a mixed salt.

Define exothermic and endothermic reactions. Give two examples of each.

Which of the following statements are true with respect to the production of iron?

Write the name and molecular formula of alcohol derived from butane.

Select the salts among the following compounds:

1. $HCl$ 2. $NaCl$ 3. ${Cu\left(OH\right)}_2$ 4. ${CuSO}_4$ 5.${CH}_{3}COOH$

6. ${CH}_{3}COONa$ 7. ${Na}_2{SO}_4$ 8. $H_2{SO}_4$ 9.${Ca\left(OH\right)}_2$ 10. ${CaCl}_2$

Give exceptions for the following:

solid non metals are hard

Metals have high boiling and melting points

Does alkaline also dissociate in water

Do all bases are antacids. If no then why?

How Many number of oxygen present in following equation?and also balance the following equation.

C5H11NH2+O2 gives CO2+H2O+NO2

Write a balanced chemical equation for each of the following :

1. Carbon disulphide burns in air to give carbon dioxide and sulphur dioxide.

2. Calcium hydride reacts with water to form calcium hydroxide and hydrogen gas.

3. Methyl alcohol burns in air to form carbon dioxide and water.

4. Liquid hydrogen peroxide decomposes to give water and oxygen gas.

5. Aluminium hydroxide reacts with sulphuric acid to give ammonium sulphate and water.

6. Aluminium sulphate solution reacts with sodium hydroxide to form a precipitate of aluminium hydroxide.

If I dissolve an acid to water it gives me h ions eg. NaCl give Na+cl- ions my teacher said NaCl breaks into h and cl ions what does it mean this compound breaks into na and cl ions how they exist they are already in ionic compound so what does it mean

What happens when Barium Chloride solution is mixed with Ammonium Sulphate solution classify this reaction

What is "stability of atoms"?

Explain the physical properties of ethanol.

The white precipitate of silver chloride is soluble in excess of:

This wine_________ an acquired taste.

What do you mean by secondary cells?

The elements and their atomic numbers are given:

A = 6
B = 24
C = 32
D = 49
Which of the elements belong to same group?

When ${NaHCO}_3$ is heated, what is obtained?

Choose the correct options for the major use of LPG.

___ is a byproduct of coal used in the extraction of metals.

Diamond is an example of

Give the composition of brass.

The colour of phenolphthalein in acids is:

Out of $KCI,HCI,CC{I}_{4}andNaCI$, the compounds which are not ionic are:

(a) $KCIandHCI$

(b) $HCIandCC{I}_4$

(c) $CC{I}_{4}andNaCl$

(d) $KCIandCC{I}_4$