NDA CHEMISTRY QUIZ - 24

Attempt now to get your rank among 5 students!

Question 1:

When a piece of marble is dropped in HCl solution , a gas X is produced . When the gas is passed through lime water , a white precipitate Y is formed . If excess of gas is passed , this white precipitate dissolves due to formation of soluble salt Z . X , Y and Z are 

Question 2:

Solution A when reacts with zinc granules , release a gas that burns with pop sound . The solution contain 

Question 3:

Directions – Question consist of two statements labelled as statement I and statement II . Examine both the statement and mark the correct choice according to the codes given below 

Statement I – All bases dissolve in water 

Statement II – All bases are alkali 

Question 4:

Which one of the following indicators retains its smell in presence of acid and loses its smell in presence of base?

  1. Onion 
  2. Vanilla extract
  3. Turmeric
  4. Beetroot juice 

Question 5:

A white kurta has a yellow stain of curry , when soap is rubbed on it , it turns reddish brown . On rinsing the kurta with plenty of water , reddish brown colour changes to yellow colour again . Which indicator is present in curry and what is the nature of soap ?

Question 6:

Which of the following is the mineral acid ?

  1. Lactic acid
  2. Sulphuric acid 
  3. Hydrochloric acid
  4. Oxalic acid

Question 7:

Which of the following indicators turns yellow in basic solution 

  1. Methyl orange
  2. Methyl red
  3. Phenolphthalein
  4. Blue Litmus paper 

Question 8:

Colour of solution becomes blue – green when copper oxide reacts with hydrochloric acid due to formation of 

Question 9:

Zinc pieces are dropped in test tube A and hydrochloric acid  is poured  in test tube B. It is observed that , 2 different gasses are evolved from the test tube . One burns with pop sound and other turns lime water milky . Test tube A and B contains

Question 10:

Sulphuric acid is added in a test tube containing sodium chloride solution . A gas X is released . Which turn moist blue litmus paper to red but do not give any effect on dry blue litmus paper . Gas X is