Question 1 :
What happens when granulated zinc metal reacts with sodium hydroxide solution?
Question 2 :
Which of the following is not one of the reactants to produce baking soda?
Question 3 :
Five solutions A, B, C, D and E when tested with universal indicator showed pH as 4, 1, 11, 7 and 9 respectively. Which solution is weakly acidic?
Question 13 :
Gastric juice has a pH of about 1.2, what can you say about its nature ?
Question 14 :
Which gas is used in the manufacturing of ammonia in fertilisers?
Question 15 :
Which compound can be used to remove hardness of water permanently?
Question 17 :
What type of reaction occurs when an acid reacts with base?
Question 21 :
A solution turns red litmus blue, its pH is likely to be _____.
Question 23 :
If someone is suffering from acidity, which of the following will be the best remedy for him?
Question 24 :
Which of the following is a property of Calcium hydrogen carbonate when excess carbon dioxide is passed through calcium carbonate ?
Question 27 :
Which of the following is a correct representation of hydroxide ions?
Question 28 :
Which one of the following type of medicines is used for treating indigestion?
Question 35 :
Why does milk of pH 6 takes a long time to set as curd when a milkman adds a very small amount of baking soda to fresh milk?
Question 43 :
What is the colour of impure salt crystals found across the world?
Question 46 :
Which acid is injected by the stinging hair of nettle leaves?
Question 47 :
What is the colour of copper sulphate crystals when water of crystallisation is removed?
Question 50 :
What is meant by the half a water molecule in the formula of plaster of paris?