QUESTION | ANSWER |
Lemon juice is Basic
Acidic Neutral
Metallic
| Acidic |
A pH of below 7 indicates Alkalinity
Presence of Ions
Purity of the sample
Acidity
| Acidity |
Fill in the missing word Acid + _______ = Salt + Water Metal
Non Metal
Oxygen
Base
| Base |
Acids change a litmus paper from Red to Blue
Green to White
Blue to Red Red to Purple
| Blue to Red |
Fizziness in Coco-Cola/Pepsi is caused by Helium
Carbon Dioxide Hydrogen
Nitrogen
| Carbon Dioxide |
A substance which speeds up a chemical reaction without itself getting affected is known as a Catalyst Counter Ion
Nucleus
Cation
| Catalyst |
Which of the following gases is green in color? Krypton
Neon
Chlorine Hydrogen
| Chlorine |
Heat is liberated in Endothermic Reactions
Substitution Reactions
All chemical reactions
Exothermic Reactions
| Exothermic Reactions |
The lead of a pencil mainly contains Lead
Carbon Black
Plastics
Graphite
| Graphite |
What gas is evolved when dilute sulphuric acid is added to Zinc? Hydrogen Sulphur Dioxide
Argon
Hydrogen Peroxide
| Hydrogen |
A substance that absorbs moisture is known as Hydrophilic
Hydrophobic
Hygroscopic Amorphous
| Hygroscopic |
Which of the following is not an acid? HCl
H2SO4
HNO3
NaOH
| NaOH |
What is the combination of any substance with oxygen known as? Reduction
Combustion
Oxidation Hydrogenation
| Oxidation |
Which of the following is not a physical change? Decantation
Distillation
Precipitation
Oxidation
| Oxidation |
The two allotropes of phosphorus are Rhombic Phosphorus, Monoclinic Phosphorus
Alpha Phosphorus, Beta Phosphorus
Crystalline Phosphorus, Amorphous Phosphorus
Red Phosphorus, Yellow Phosphorus
| Red Phosphorus, Yellow Phosphorus |
Which of the following is a chemical change? Boiling of water
Rusting of iron Freezing of water
Dissolving of salt in water
| Rusting of iron |
If no more solute can be dissolved in a solvent at a given temperature then that solution is called A Saturated Solution An Unstable Solution
A Real Solution
A Dispersed Solution
| A Saturated Solution |
Which of the following is not an allotrope of carbon Charcoal
Diamond
Silk Graphite
| Silk |
Solubility of a substance in a solvent usually increases with an increase in temperature. True False
| True |
Catalysts often speed up certain chemical reactions. False
True
| True |