Home/Class 12/Chemistry/

Question and Answer

Sulphide ore is common for _______ metal. (Cu, Mg, Na, K)
Choose the correct one.

(A) Cu

Answer

Answer: A

  1. Argentite (\(Ag_2S\))
  2. Galena (\(PbS\))
  3. Chalcocite (\(Cu_2S\))
  4. Copper pyrite (chalco pyrite) [\(CuFeS_2\)]

Cu is the correct answer.
To Keep Reading This Answer, Download the App
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play
To Keep Reading This Answer, Download the App
4.6
star pngstar pngstar pngstar pngstar png
Review from Google Play
Correct50
Incorrect0
Watch More Related Solutions
At what temperature is the Fahrenheit scale reading equal to twice of Celsius ?
(A) \( 40^0C \)
(B) \( 160^0C \)
(C) \( 80^0C \)
(D) \( 100^0C \)
Pick the true statement amongst the following.

(A) \(Ni (II)\) compounds are less stable than \(Pt(II)\) compounds
(B) \(Ni (IV)\) compounds are more stable that \(Pt(IV)\) compounds
(C) \(Ni (IV)\) compounds are less stable than \(Pt(IV)\) compounds
(D) \(Ni (IV)\) compounds are more stable than \(Pt(II)\) compounds
Which part of the plant is involved in sexual reproduction?

(A) Root
(B) Flower
(C) Leaf
(D) Stem
A neutron, with kinetic energy KE and moving with velocity \(v\), collides head on with a nucleus of mass number \(A\) perfectly elastically. The fraction of total energy possessed by the neutron transferred to nucleus is
(A) \(\dfrac{4A}{(A+1)^2}\)
(B) \(\left(\dfrac{A-1}{A+1}\right)^2\)
(C) \(\left(\dfrac{A+1}{2A}\right)^2\)
(D) \(\left(\dfrac{A-1}{2A}\right)^2\)
Which is true about Rochelle's salt and lead zirconate?
(A) Rochelle's salt is ferroelectric while lead zirconate is anti-ferroelectric
(B) Rochelle's salt is anti-ferroelectric and lead zirconate is ferroelectric
(C) Both are ferroelectric
(D) Both are anti- ferroelectric
Thermal radiations are similar to

(A) \( \alpha \) rays
(B) X-rays
(C) cathode rays
(D) none of these
The wave function (in SI units) for an electromagnetic wave is given as
\(\psi (x,t)={ 10 }^{ 3 }\sin p{ \left( 3\times { 10 }^{ 6 }x-9\times { 10 }^{ 14 }t \right) } \).The speed of the wave is:

(A) \(9\times { 10 }^{ 14 }\)
(B) \(3\times { 10 }^{ 8 }\)
(C) \(3\times { 10 }^{ 6 }\)
(D) \(3\times { 10 }^{ 7 }\)
Decrease \(8\) by \(12\%\)
___________ is the key to increase the number of cells in a living being.
(A) Metabolism
(B) Growth
(C) Cell division
(D) Reproduction
Pragya Raptor code around a circular path of radius 4 cm and cut off the length required to the end. Then she wrapped it around a square box of side 4 cm did she have any code left?

Load More