Advertisements
Advertisements
प्रश्न
An acidic oxide is produced by the element:
(a) Na
(b) C
(c) Ca
(d) H
Advertisements
उत्तर
(b) C
Because C is a non-metal, its oxide CO2 is an acidic oxide.
APPEARS IN
संबंधित प्रश्न
.................... liberated when acetic acid reacts with sodium metal.
(a) Hydrogen
(b) Chlorine
(c) Oxygen
(d) Nitrogen
A copper coin is kept immersed in a solution of silver nitrate for some time. What will happen to the coin and the colour of the solution?
Name the metal which has been placed at the top of the reactivity series.
Write equation for the reaction of magnesium with oxygen.
Complete and balance the following equation:
Na + O2 →
Which of the following elements would yield a neutral oxide?
Na, S, C, K, H
Name another metal oxide which behaves like aluminium oxide.
Hydrogen is not a metal but still it has been assigned a place in the reactivity series of metals. Why?
The elements whose oxides can turn phenolphthalein solution pink are:
(a) Na and K
(b) K and C
(c) Na and S
(d) K and P
One of the following is not a neutral oxide. This is:
(a) CO
(b) H2O
(c) N2O
(d) Na2O
You are given a solution of AgNO3. Which of the following do you think cannot displace Ag from AgNO3solution?
(a) Magnesium
(b) Zinc
(c) Gold
(d) Copper
An element E reacts with water to form a solution which turns phenolphthalein solution pink. The element E is most likely to be:
(a) S
(b) Ca
(c) C
(d) Ag
Which one of the following four metals would be displaced from the solution of its salt by the other three metals?
(a) Zn
(b) Ag
(c) Cu
(d) Mg
Which of the following pair of reactants can undergo a displacement reaction under appropriate conditions?
(a) MgSO4 + Fe
(b) ZnSO4 + Fe
(c) MgSO4 + Pb
(d) CuSO4 + Fe
Write the name and formula of a molecule made up of three atoms of oxygen.
Write the chemical equation of the above process.
Write the chemical equation for the following reaction:
Cinnabar is heated in the presence of air.
A cable manufacturing unit tested few elements on the basisof their physical properties.
| Properties | W | X | Y | Z |
| Malleable | Yes | No | No | Yes |
| Ductile | Yes | No | No | Yes |
| Electrical conductivity | Yes | Yes | Yes | No |
| Melting Point | High | Low | Low | High |
Which of the above elements were dicarded for usage by the company?
Generally, metals are solid in nature. Which one of the following metals is found in liquid state at room temperature?
Metals are generally hard. Which of the following metals is an exception and can be cut with a knife?
