General
✓✗A poisonous gas ‘X’ reacts with another gas ‘Y’ that burns with a pop sound at 300 Atmospheric pressure and 300°C in presence of catalysts zinc oxide and chromium oxide, to produce a substance ‘Z’ which is used to denature ethanol. Identify X, Y and Z
- X = SO2, Y = H2, Z = CH3COOH
- X = CO, Y = CO2, Z = CH3OH
- X = CO, Y = H2, Z = CH3OH
- X = CO, Y = H2, Z = C2H5OH
General
✓✗Addition of oxygen to a compound is
- reduction
- oxidation
- neutralization
- precipitation
General
✓✗The given reaction is an example of
- decomposition reaction
- combination reaction
- double displacement reaction
- displacement reaction
General
✓✗Rancidity can be prevented by
- adding butylated hydroxyanisole (BHA)
- Flushing with Oxygen gas
- Keeping at warmer temperature
- All of these
General
✓✗The condition which must be satisfied by a chemical reaction is
- The reactants must be taken in fixed quantities
- A change in temperature must occur
- The law of conservation of mass must be obeyed
- A colour change must be seen
General
✓✗The conditions required for a reaction to take place are written on
- Left hand side
- Right hand side
- the Arrow
- Any where
General
✓✗Removal of oxygen from a compound is
- reduction
- oxidations
- precipitation
- neutralization
General
✓✗Which one of the following is not a characteristic of a chemical reaction?
- change in temperature, state and colour
- evolution of gas
- formation of a precipitate
- formation of no new substance
General
✓✗An acid which can decolourise purple coloured potassium permanganate solution is:
- Sulphuric acid
- Citric acid
- Carbonic acid
- Hydrochloric acid
General
✓✗Which one of the following is not a balanced equation?
