Chemistry, asked by rinal67, 5 months ago


Choose the correct answer
1. Which is used for increasing the efficiency of solar cells?
a) Brass
b) Zine Sulphide
2. Which of the following is an ore of silver?
a) Azurite
b) Prousitie
c) Cast iron
d) Gold nano particles
3.
Reason (R)
4.
c) Cerrusite
Assertion (A) : Silicones are used for making water proffing clothes.
d) Prousitite
: In silicones the organic side groups which surrounds silicon make the
molecule look like an alkane.
a) Both A and Rare correct, R explains A
b) A is correct but R is wrong
c) A is wrong but R is correct
d) Both A and Rare correct but R does not explain A
Quartz is an example of
a) Inosilicate's
b) Phyllo silicates c) Tecto silicates
Thermodynamically stable allotropic form of sulphur is
a) Rhombic Sulphur b) Monoclinic Sulphur c) Plastic Sulphur d) Colloidal Sulphur
The correct order of acidic strength
a) HF> HCI > HBr > HI
b) HF < HCI < HBr < HI
c) HF > HCI < HBr > HI
in diamagnetic?
d) Chain silicates
5.
6.
d) HF < HCI > HBr < HI​

Answers

Answered by baigalfaiz515
1

Answer:

1)zinc sulphide

Explanation:

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Answered by hardeep20
0

Answer:

  1. There are several ways to increase efficiency of solar cells. The first one consists in combining semiconductor photovoltaic converters with suitable heat absorbing bodies that is, water or oil for heat them and use this thermal energy. This specific method is already applied in industry.
  2. The most common silver-bearing minerals recovered by flotation are argentiferous galena, native silver, argentite (Ag2S) and tetrahedrite (Cu,Fe,Ag) Sb4S3). Often these minerals float with the base metals such as copper and lead sulphides or are the primary target mineral (tetrahedrite)
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