Alizarin gives a red colour by mordanting it with the sulphate of a metal.

The metal ion involved is:

1. Cr${}^{3+}$

2. Fe${}^{3+}$

3. Al${}^{3+}$

4. Sn${}^{2+}$

A vat dye, often used in dyeing jeans is -

1. Indigo 

2. Alizarin 

3. Picric acid 

4. Crystal violet 

Bithional is an example of:
1. Disinfectant 
2. Antiseptic
3. Antibiotic 
4. Analgesic 

An example of a liquid propellant is:

1. Nitro cellulose

2. HNO₃ + HCl

3. Hydrazine 

4. None of the above 

A space rocket is propelled by:
1. An automobilic engine 
2. Nuclear Engine 
3. Steam Engine 
4. Mixture of fuel and oxidiser called propellant 

A narrow spectrum antibiotic is active against:
1. Gram positive or gram negative bacteria.
2. Gram negative bacteria only.
3. Single organism or one disease.
4. Both, gram positive and gram negative bacteria.

A compound that can enhance the lathering property of soap is :
1. Sodium carbonate
2. Sodium rosinate
3. Sodium stearate
4. Trisodium phosphate

The function of glycerol in the soap is -
1. That of a filler.
2. To increase lathering.
3. To prevent rapid drying.
4. To make soap granules.

A chemical that can be used as a sweetening agent, temperature and is calorie-free is
1. Sucrose
2. Glucose
3. Aspartame
4. Sucralose

The incorrect statement among the following regarding aspirin is -

1. Aspirin belongs to narcotic analgesics.

2. It is effective in relieving pain.

3. It has anti-blood-clotting action.

4. It is a neurologically active drug.