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- Multiple ChoicePlease save your changes before editing any questions.
Which one of the following is acidic?
Lemon juice
Tomatoes
Milk
All
- Multiple ChoicePlease save your changes before editing any questions.
Which one of the following will turn red litmus blue?
Vinegar
Baking soda solution
Lemon juice
Soft drinks
- Multiple ChoicePlease save your changes before editing any questions.
Which one of the following will turn blue litmus red?
Vinegar
Lime water
Baking soda solution
Washing soda solution
- Multiple ChoicePlease save your changes before editing any questions.
Methyl orange is
Pink in acidic medium, yellow in basic medium
Yellow in acidic medium, pink in basic medium
Colourless in acidic medium, pink in basic medium
Pink in acidic medium, colourless in basic medium.
- Multiple ChoicePlease save your changes before editing any questions.
Lime water is
CaO
Ca(OH)2
CaCO3
CaCI2
- Multiple ChoicePlease save your changes before editing any questions.
The nature of calcium phosphate is present in tooth enamel is
Basic
Amphoteric
Acidic
Neutral
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following salts has no water of crystallization?
Blue vitriol
Washing soda
Baking soda
Gypsum
- Multiple ChoicePlease save your changes before editing any questions.
The function of quick lime in soda lime mixture is to
Absorb moisture present in soda lime
Increase the efficiency of soda lime
Increase the pH of soda lime
Take part in reaction with NaOH
- Multiple ChoicePlease save your changes before editing any questions.
The Ph of a solution of HCL is 4. This shows that the molarity of the solution is
4.0M
0.4M
0.0001M
0.001M
- Multiple ChoicePlease save your changes before editing any questions.
The difference of molecules of water in gypsum and PoP is
5/2
2b
3/2
½
- Multiple ChoicePlease save your changes before editing any questions.
Which of the following does not form an acidic salt?
Phosphoric acid
Carbonic acid
Hydrochloric acid
Sulphuric acid
- Multiple ChoicePlease save your changes before editing any questions.
The chemical formula of caustic potash is
NaOH
Ca(OH)2
NH4OH
KOH
- Multiple ChoicePlease save your changes before editing any questions.
Before burning in air, the magnesium ribbon is cleaned by rubbing with a sand paper to:
Make the ribbon surface shinier
Remove the layer of magnesium oxide from the ribbon surface
Remove the layer of magnesium carbonate from the ribbon surface
Remove the moisture from the ribbon surface
- Multiple ChoicePlease save your changes before editing any questions.
In a chemical reaction between sulphuric acid and barium chloride solution the white precipitates formed are of:
Hydrochloric acid
Barium sulphate
Chlorine
Sulphur
- Multiple ChoicePlease save your changes before editing any questions.
The respiration process during which glucose undergoes slow combustion by combining with oxygen in the cells of our body to produce energy, is a kind of:
Exothermic process
Endothermic process
Reversible process
Physical process
- Multiple ChoicePlease save your changes before editing any questions.
A chemical reaction does not involve:
Formation of new substances having entirely different properties than that of the reactants
Breaking of old chemical bonds and formation of new chemical bonds
Rearrangement of the atoms of reactants to form new products
Changing of the atoms of on element into those of another element to form new products
- Multiple ChoicePlease save your changes before editing any questions.
One of the following processes does not involve a chemical reaction. That is:
Melting of candle wax when heated
Burning of candle wax when heated
Digestion of food in our stomach
Ripening of banana
- Multiple ChoicePlease save your changes before editing any questions.
It is necessary to balance a chemical equation in order to satisfy the law of:
Conservation of motion
Conservation of momentum
Conservation of energy
Conservation of mass
- Multiple ChoicePlease save your changes before editing any questions.
All the methods mentioned below can be used to prevent the food from getting rancid except: i. Storing the food in the air-tight containers
ii. Storing the food in refrigerator
iii. Keeping the food in clean and covered containers
iv. Always touching the food with clean hands
(i) and (ii)
(i) and (iii)
(i), (iii) and (iv)
(iii) and (iv)
- Multiple ChoicePlease save your changes before editing any questions.
Rusting of iron involves a chemical reaction which is a combination of:
Reduction as well as combination reactions
Oxidation as well as combination reactions
Reduction as well as displacement reactions
Oxidation as well as displacement reactions