Explore topic-wise InterviewSolutions in .

Explain why an antacid tablet is taken when one suffers from acidity? [3 MARKS]

The standard reduction potential of the half cells at 298 K are,Ni2+(aq)+2e−→Ni(s);Eo=−0.28 VMg2+(aq)+2e−→Mg(s);Eo=−2.37 VThe standard cell potential for a voltaic cell constructed using the two half reaction is

A soap bubble of radius R and film thickness t (t

If the earth is a planet without any soil, which of the following would be our biggest concern?

How to identify the state in particular chemical equation ?For e.g. : aqueous solution

The total number of products formed by thermal decomposition of FeSO4 are :3

What kind of change does this represent?Reactants → Products

Zinc and hydrochloric acid react according t reaction Zn(s) + 2HCI(aq.)-ZnCl2(aq.)+ H2(9) If 0.30 mole of Zn are added to hydrochloric hed containing 0.52 mole HCI, how many moles of H2 are produced?

Sodium hydroxide turns phenolphthalein solution to-

Option 15Stainless steel is very useful material for our life. In stainless steel, iron is mixed with(a) Ni and Cr (b) Cu and Cr (c) Ni and Cu (d) Cu and Au

Locate the following zones given as boxed items in figure which shows a diagram of soil profile.Topsoil, Subsoil, C-horizon, Bedrock

When the energy of activation is 90 kJ mol−1, the rate constant of a reaction at 303 K and 273 K are k2 and 6.5×10−8s−1 respectively. Find the value of log10 k2. Take, log(6.5)≈0.8

Which of the following generates most of the sewage?

If percentage of Zn (atomic mass = 65.38) in a biomolecule is 0.75% by weight, then the minimum molar mass (in g mol–1) of biomolecule will beOptions:10243.459483.298012.12Should have chosen 8717.33

Give steps to balance following equation FeCr_2O_4+K_2CO_3+KClO_3→ Fe_2O_3+K_2CrO_4+KCl+CO_2

The silkworm is (a) a caterpillar, (b) a larva. Choose the correct option.(i) a (ii) b (iii) both a and b (iv) neither a nor b

Classify the following as natural or synthetic indicators.Turmeric, red cabbage, phenolphthalein, methyl orange, litmus paper.

Question 44Match the reaction given in the column (A) with the names given in column(B)

Why buttermilk gets spoilled if kept in a copper or brass container?

Relationship between equilibrium constant, reaction quotient and Gibb's energy.

Question 3 (a)Discuss the effects of deforestation on wild animals.

For a chemical reaction,A-(arrrow)B, the rate increases by a factor of 2.25 when the concentration of A is increased by 1.5.What is the order of the reaction?

Calculate the activation energy of a reaction whose rate constant is tripled by 10oC rise in the temperature from 22oC.Take ln (3)=1.1

Complete the crossword Fig. 6.1 with the help of the clues​​Down​2. A chemical process in which a substance reacts with oxygen to give off heat. (10)​3. Petrol is used as a __________ in automobiles. (4)​ 6. It is as hard as stone and black in colour .(4)​

What is the difference between an atom,element,molecule and a compound

Why the animals living deep inside the soil come out during heavy rains?

A solution of concentration CuSO4 is electrolysed for 965s with a current of 20 A and 50% efficiency. The amount of Cu deposited at cathode will be??

The unit of rate constant for a second order reaction is:

Which of the following is a neutralisation reaction?

What is the percentage composition of the two elements present in a molecule of hydrochloric acid?

What is crop rotation?

An _______ could be either atoms or molecules.

Which of the following air pollutants reduces the oxygen-carrying capacity of blood?

Define corrosion. How does it affects?

Let us consider a laddu. A laddu is made up of yellow and red boondis. What kind of mixture would you call it?

Question 2What is a neutralization reaction? Explain with an example.

What is meant by growth?

Why do we pass air through wastewater during wastewater treatment?

MO gives 20%M. Find Em=?

In which state is Flame?

1.Describe the series of steps involved in wool extraction? 2.As seasons change from winter to summer and then to rains,how would you choose your clothes?

For the cell reaction3+2Fe (aq)+21 (aq)2Fe (aq)+2(aq)Eal0.24 V at 298 K. The standard Gibbscellenergy (A,Go) of the cell reaction is

Write the balanced chemical equation for the following reaction:Barium chloride + Potassium sulphate → Barium sulphate + Potassium chloride

how many of sulphur atoms does 45.5g of sulphur contain?

The rate of a chemical reaction doubles for every 10∘C rise of temperature. If the temperature is raised by 50∘C, the rate of the reaction increases by about:

Which of the following is the major source for evaporation of water?

Saving paper means saving trees. Why?

Sulphur and oxygen are known to form two compounds. The sulphur content in one of these is 51% while in the other is 41%.show that this data is in agreement with the law of multiple proportions.

Complete the crossword Fig. 6.1 with the help of the cluesDown2. A chemical process in which a substance reacts with oxygen to give off heat. (10)3. Petrol is used as a __________ in automobiles. (4) 6. It is as hard as stone and black in colour .(4)