Which of the following statements is not correct
Which of the following statements is not correct
Options
(a) silicon is extensively used as a semiconductor (b) Carborundum is SiC (c) Silicon occurs in free state in nature (d) Mica contains the […]
S and Some P Block Elements
Which of the following is a metalloid
Which of the following is a metalloid
Options
(a) C (b) Si (c) Ge (d) Sn
Correct Answer:
Ge
Explanation:
No explanation available. Be the first to write the explanation for this question […]
In graphite C atom is in …state
In graphite C atom is in …state
Options
(a) sp³ (b) sp (c) sp² (d) none of these
Correct Answer:
sp²
Explanation:
In graphite, the carbon atoms are arranged in regular hexagons in […]
White lead is
White lead is
Options
(a) Pb₃O₄ (b) PbO (c) 2PbCO₃.Pb (OH)₂ (d) Pb(CH₃COO)₂.Pb(OH)₂
Correct Answer:
2PbCO₃.Pb (OH)₂
Explanation:
No explanation available. Be the first to write the explanation for this question by […]
The adjacent sheets are bonded together in graphite with
The two adjacent sheets are bonded together in graphite with
Options
(a) van der waals forces (b) ionic bonds (c) metallic bonds (d) covalent bonds
Correct Answer:
van der waals forces
Explanation:
The two […]
In laboratory burners , we use
In laboratory burners , we use
Options
(a) producer gas (b) oil gas (c) gobar gas (d) coal gas
Correct Answer:
oil gas
Explanation:
No explanation available. Be the first to write the […]
Carbogen is
Carbogen is
Options
(a) pure form of carbon (b) COCl₂ (c) mixture of CO and CO₂ (d) mixture of O₂ and CO₂
Correct Answer:
mixture of O₂ and CO₂
Explanation:
No explanation available. […]
Which statement is correct
Which statement is correct
Options
(a) silicon hybride catches fire on exposure to air (b) silicon halides are not easily hydrolysed by water (c) silicon is not a semi conductor (d) silicon does […]
By passing air over red hot coke the gas obtained is
By passing air over red hot coke the gas obtained is
Options
(a) coal gas (b) water gas (c) oil gas (d) producer gas
Correct Answer:
producer gas
Explanation:
No explanation available. Be […]
At room temperature the solid compound is
At room temperature the solid compound is
Options
(a) CO₂ (b) SiO₂ (c) NO₂ (d) SO₂
Correct Answer:
SiO₂
Explanation:
Silicon dioxide consists of continous lattice of silicon and oxygen connected by covalent […]