Acids and Metals

Which of the following will give a colourless gas that burns with pop sound on reaction with dilute $\mathrm{HCl}$?

Explain why zinc is made to react with dilute hydrochloric acid, but not with concentrated hydrochloric acid.

What will be the products when an acid reacts with metals?

What happens when dilute Hydrochloric acid is added to iron filings?

Magnesium hydroxide has been used as an _____.

The formula of alkali that is used in making fertilizers is-

_____ (Ammonium/Sodium) hydroxide is used in making fertilzers.

Ammonium hydroxide is used in making-

Magnesium hydroxide is used in making fertizers.

The hydroxide that is used in making fertilizers is-

The formula of alkali that is used in making soap is-

_____ (potassium/calcium) hydroxide is used in making soaps.

Potassium hydroxide is used in making-

Calcium hydroxide is used in making soap solutions.

The hydroxide that is used in making shampoo is-

The reaction of active metals with dilute HCl leads to the evolution of a gas, which

Iman and Arianna were given four different powders. They had to design a way of finding out if the powders were metals, carbonates or neither. 
Here is their plan: 
A: Add one spatula of powder to a test tube. 
B: Add $5 {\mathrm{cm}}^3$ of hydrochloric acid to the test tube. 
C: Fit a bung loosely on top of the test tube. 
D: If the powder bubbles, remove the bung and hold a lighted splint close to the top of the tube. 
E: Repeat steps A and B. Fit a bung with a delivery tube into the test tube — put the other end of the delivery tube into a test tube of limewater. 

Here are their results:

Which of the following are powders of metal?

Name the acid present in 'Baking powder'.

Name an acid that is used as a preservative. 

Name the acid which is used in the preparation of soft drinks.