$$C{H_4}(g) + {H_2}(g)\buildrel {1270\,K} \over \longrightarrow CO(g) + 3{H_2}(g)$$
In the reaction given above, the mixture of CO and H2 is
1. Electron is a constituent of cathode ray.
2. Electron is a negatively charged particle.
3. The mass of the electron is equal to the mass of the proton.
4. Electron is deflected by the electric field but not by magnetic field.
Select the correct answer using the codes given below.
1. It is extensively used as a moderator in nuclear reactors.
2. It cannot be used in exchange reaction to study reaction mechanism.
3. Viscosity of heavy water is relatively smaller than that of ordinary water.
4. The dielectric constant of heavy water is smaller than that of ordinary water.
Select the correct answer using the codes given below.
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I. Petroleum is a mixture of many different hydrocarbons of different densities.
II. The grade of petroleum depends mainly on the relative proportion of the different hydrocarbons.
1. Carbon is oxidised
2. Hydrogen is oxidised
3. Hydrogen is reduced
4. Carbon is reduced
Select the correct answer using the code given below :
1. Diamond, 2. Graphite, 3. Fullerenes
Select the correct answer using the code given below.
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1. Chemical reactions happening in the system cannot change the velocity (v) of the centre of mass of the object.
2. Chemical reactions happening in the system cannot change kinetic energy of the particles inside with respect to the centre of mass of object.
Select the correct answer using the code given below :
Fe(s) + CuSO4 (aq) $$\to$$ FeSO4 (aq) + Cu (s)
List I (Chemical Name) | List II (Chemical Formula) |
A. Washing soda | 1. CaOCl₂ |
B. Baking soda | 2. NaHCO₃ |
C. Bleaching powder | 3. Na₂CO₃·10H₂O |
D. Gypsum | 4. CaSO₄·2H₂O |
Code:
The relative atomic mass of boron (which exists in two isotopic forms 10B and 11B) is 10.81. What will be the abundance of 10B and 11B, respectively (consider a sample of 100 atoms)?
Which among the following are essential constituents of Portland cement?
Litmus, a well-known acid-base indicator, is derived from :
What is the oxidation state of Vanadium in $V_2O_5$?
Match List-I with List-II and select the correct answer using the code given below the Lists:
List-I (Allotrope of Carbon) |
List-II (Property) |
---|---|
A. Graphite | 1. Thinnest and strongest material |
B. Diamond | 2. Hardest natural substance |
C. Fullerene | 3. Very light and strong material |
D. Graphene | 4. Soft and slippery material |
Water gas is a mixture of:
Which one among the following statements with reference to the properties of water is not correct?
Which one among the following compounds has a sweet and fruity smell?
What is the coordination number of Na⁺ and Cl⁻ ions in NaCl lattice?
Which one among the following is present in the nettle leaf hairs that causes burning pain?
Which one among the following is known as Milk of Magnesia?
Soap with water forms :
Which among the following is the correct composition of Borax?
Which one among the following oxides has the highest melting point?
Consider the following reaction:
Fe2O3(s) + 2Al(s) → 2Fe(s) + Al2O3(s)
Which of the following statements about the given reaction is NOT correct?
Match List I with List II and select the correct answer using the code given below the Lists:
LIST I (Chemical process) |
LIST II (Reaction) |
||
A. |
Electrolysis of water |
1. |
Double displacement |
B. |
Burning of coal |
2. |
Combination reaction |
C. |
Iron nail immersed in copper sulphate solution |
3. |
Decomposition reaction |
D. |
Addition of barium chloride solution to aluminium sulphate solution |
4. |
Displacement reaction |
Consider the following reaction:
2HgO $ \stackrel{\Delta}{\longrightarrow} $ 2Hg + O2
The respective state of HgO, Hg and O2 in the above reaction is
Match List I with List II and select the correct answer using the code given below the Lists:
LIST I (Process) |
LIST II (Separation method) |
||
A. |
Separation of acetone and water from their mixture |
1. |
Chromatography |
B. |
Separation of water |
2. |
Centrifugation |
C. |
Separation of cream from milk |
3. |
Distillation |
D. |
Separation of pigments from plant extract |
4. |
Separating Funnel |
Which among the following statements with respect to carbon is/are correct?
1. Carbon forms the basis for all living organisms and many things we use
2. Carbon shows tetra-valency and the property of catenation
3. Carbon forms covalent bonds with itself and other elements
4. Carbon forms compounds containing triple and tetra bonds between carbon atoms
Select the correct answer using the code given below: