Explore topic-wise InterviewSolutions in .

From the following information calculate total purchases:

$\begin{array}{cc}& \text{(Rs.)}\\ \text{Creditors Jan 1, 2005}& 30,000\\ \text{Creditors Dec 31, 2005}& 20,000\\ \text{Openining balance of Bills Payable}& 25,000\\ \text{Closing balance of Bills Payable}& 35,000\\ \text{Cash paid to Creditors}& 1,51,000\\ \text{Bills discharged}& 44,000\\ \text{Cash purchase}& 1,29,000\\ \text{Return outwards}& 6,000\end{array}$

On 1st January, 2013, Satkar Transport Ltd purchased 3 buses for Rs. 10,00,000 each. On 1st July, 2015 one bus was involved in an accident and was completely destroyed and Rs. 7,00,000 were received from the insurance company in full settlement. Depreciation is written-off 15% per annum on diminishing balance method. Prepare bus account from 2013 to 2016. Books are closed on 31st December, every year.

Balance the equation : HNO3+Ca(OH)2 gives Ca(NO3)2+H2O.

During the electrolytic refining of copper, the impurities which settled down at the bottom of the anode in the form of sludge are called as __.

Formula mass is applicable in the case of:

(a) State the various characteristics of chemical reactions.

(b) State one characteristic each of the chemical reaction which takes place when :
(i) dilute hydrochloric acid is added to sodium carbonate

(ii) lemon juice is added gradually to potassium permanganate solution

(iii) dilute sulphuric acid is added to barium chlorid solution

(iv) quicklime is treated with water

(v) wax is burned in the form of a candle

Do all metals react with acid to give out hydrogen gas?

Amphoteric oxide + Alkali $\to$

In a reversible reaction, a catalyst

What is the molarity of a solution that contains 20 g of NaOH in 1 L?

Which of the following gives white precipitates on reaction with dilute $H_{2}S{O}_4$?

In metallurgy, which of the following are popular methods of concentration?

Which is the lightest and the most abundant element in the universe?

Calculate the relative molecular mass and vapour density of methyl alcohal ch3oh if 160g of the alcohal on vaporization has a volume of 112 litres at s.t.p

What is brisk effervescence?

For P, Q, R and S are all obtained by the reduction of their oxides with carbon. Metal P is used to form a thin layer over the sheets of metal S to prevent its corrosion. Metal Q is used for electroplating tiffin boxes made of metal S whereas metal P, Q, R and S? How have you arrived at this conclusion?

The Government of India has recently allowed a chemical to be mixed with petrol. Identify the chemical.

The harmful chemical which is accumulating in the humans being through the food chain is :

(a) benzene hexachloride (b) dichloro diphenyl trichloroethane

(c) chlorofluorocarbon (d) abscisic acid

Which chemical substance is added to LPG to help in detection of its leakage?

Alkanes are:

(a) Give the names and structural formulae of the next two higher homologues of methane.
(b) The molecular formula of a hydrocarbon is $C_{10}{H}_{18}.$ Name its homologous series.
(c) Select the hydrocarbons which are members of the same homologous series. Give the name of each series.
$C_5{H}_{10};C_3{H}_8;C_6{H}_{10};C_4{H}_{10};C_7{H}_{12};C_8{H}_{16}$

___are substances which alter the rates of chemical reactions without themselves undergoing any chemical change.

Why is graphite used for making electrodes in a dry cell?

Which is the correct representation of Hydrolysis?

The ionization energy of $F^{-}$ is 320 kJ/mole. The electron gain enthalpy of fluorine would be?

Explain the chemical properties of ethanol.

When ammonium hydroxide is added to iron sulphate, a green precipitate appears. The green precipitate is of:

Free electrons, generally, are not able to leave the metallic surface because

The colour of crystallised copper sulphate on treating it with sulphuric acid becomes:

The following two molecules are examples of

CH₃-CH₂-O-CH₂ -CH₃ CH₃-CH₂ -CH₂ -CH₂ - OH

Which gas is evolved when potassium nitrate is heated?

Melting point of alkanes increases with ___ in the molecule.

A white corrosive salt, silver nitrate is heated to give X, nitrogen dioxide and water. What is X?

A part of the early classification of elements has been given below :

H Li Be B C N O

F Na Mg Al Si P S

(a) Which law of classification of elements is illustrated by the above arrangement of elements?

(b) Name the scientist who proposed such a classification of elements.

(c) Why is such a classification of elements compared with a characteristic of musical scale?

(d) State one limitation of this classification of elements.

Two solutions X and Y have pH = 4 and pH = 8, respectively. Which solution will give alkaline reaction and which one acidic?

What can we say about the nature of alcohol when in a solution?

Select all the methods from the given options by which ammonia gas can be identified

$600c{m}^3$ of a gas at a pressure of 750 mm is compressed to $500c{m}^3$. Taking the temperature to remain unchanged, find the increase in pressure.

What is the n-factor / valency factor of $H_{2}C{O}_3$ ?

The elements used in Hershey and Chase’s experiments were: