QUESTION | ANSWER |
Lemon juice is Basic
Neutral
Metallic
Acidic
| Acidic |
A pH of below 7 indicates Alkalinity
Acidity Presence of Ions
Purity of the sample
| 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 Carbon Dioxide Helium
Hydrogen
Nitrogen
| Carbon Dioxide |
A substance which speeds up a chemical reaction without itself getting affected is known as a Counter Ion
Nucleus
Cation
Catalyst
| Catalyst |
Which of the following gases is green in color? Chlorine Krypton
Neon
Hydrogen
| Chlorine |
Heat is liberated in Endothermic Reactions
Substitution Reactions
Exothermic Reactions All chemical reactions
| Exothermic Reactions |
The lead of a pencil mainly contains Graphite Lead
Carbon Black
Plastics
| Graphite |
What gas is evolved when dilute sulphuric acid is added to Zinc? Sulphur Dioxide
Argon
Hydrogen Hydrogen Peroxide
| Hydrogen |
A substance that absorbs moisture is known as Hygroscopic Hydrophilic
Hydrophobic
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
Red Phosphorus, Yellow Phosphorus Crystalline Phosphorus, Amorphous Phosphorus
| Red Phosphorus, Yellow Phosphorus |
Which of the following is a chemical change? Boiling of water
Freezing of water
Dissolving of salt in water
Rusting of iron
| Rusting of iron |
If no more solute can be dissolved in a solvent at a given temperature then that solution is called An Unstable Solution
A Real Solution
A Dispersed Solution
A Saturated Solution
| A Saturated Solution |
Which of the following is not an allotrope of carbon Charcoal
Silk Diamond
Graphite
| Silk |
Solubility of a substance in a solvent usually increases with an increase in temperature. False
True
| True |
Catalysts often speed up certain chemical reactions. False
True
| True |