Ajit kneaded 1/2 kg maida along with lukewarm water. He also added some sugar and yeast in it. What will be the effect on kneaded flour after hours? Give reason for your answer.

Which contains more heat, 1 kg of ice at 0^(@)C or 1 kg of water at 0^(@)C ? Give reason for your answer.

1 g of solid sodium chloride is taken in a clean and dry test tube and 2 mL of conc. Suphuric acid is added to it . If the gas evolved is tested first with dry and then with wet blue litmus paper, in which case will the litmus paper change colour? Give reason for your answer. what inference can be drawn about the nature of the evolved gas ? Support your answer with a chemical equation for the reaction.

2 g of sugar is added to one litre of water to give sugar solution. What is the effect of addition of sugar on the boiling point and freezing point of water ?

Which contains more heat, 1 kg of water at 100^(@)C or 1 kg of steam at 100^(@)C ? Give reason for your answer.

Boojho took some grains of boiled rice in test tube 'A' and Paheli took boiled and chewed rice in test tube 'B'. Both of them poured 1-2 drops of iodine solution into the test tube and observed the colour change. What colour change would they have observed? Give reasons for your answer.

How does K_(2)[PtCl_(4)] get ionised when dissolved in water ? Will it form precipitate when AgNO_(3) solution is added to it ? Give reason for your answer ?

Devendra was told that the elements P,Q and R belong to group 2 , group 14 and group 17, respectivelhy, of the long form of periodic table. Based on this information, he was asked to answer the following questions: (a) What is the valency of (i) element P (ii) element Q and (iii) element R ? Give reasons for your answer. (b) What is nature of oxide of (i) element P (ii) element Q and (iii) element R ? Give reasons for your answer. (c) Give one example each of (i) element P (ii) element Q and (iii) element R . (d) Name three elements which occur in the same group as element R but exist in three different physical states at room temperature. (e) What values are displayed by Devendra in answering these question?

Pankaj purchased a car from Abhishek Motors for Rs. 50 lakh. The company offered many attractive gifts to Pankaj, like free insurance for two years, free pick-up and drop facilities for free servicing up to 20,000 km, etc. But after a few days Pankaj noticed that the pick-up of the car was not good and there was some problem in the engine. The company serviced the car free of cost but even then Pankaj was not satisfied with its performance and Abhishek Motors was not giving him due response. So he filed a complaint in the State Commission but was not satisfied with its decision also. He was very much disturbed and after two months decided to appeal against it. Can Pankaj appeal against the decision of the State Commission? Give reason in support of your answer.

Pankaj purchased a car from 'Abhishek Motors' for Rs. 50 lakhs. The company offered many attractive gifts to Pankaj like - free insurance for first two years, free pick-up and drop facilities for free servicing upto 20,000 km, etc. But after a few days Pankaj noticed that the pick-up of the car was not good and there was some problems in the engine. The company serviced the car free of cost but even then Pankaj was not satisfied with its performance. 'Abhishek Motors' is not giving him the due response. So he filed a complaint in the State Commission but was not satisfied with its decision also. He was very much disturbed and after two months decided to appeal against it . Can Pankaj appeal against the decision of the State Commission ? Give reason in support of your answer.