Electric bulbs are made of _______________ glass ?
Electric bulbs are made of _______________ glass ?
A. Jena
B. Flint
C. Crookes
D. Pyrex
A. Jena
B. Flint
C. Crookes
D. Pyrex
[B].
[C].
[D].
Answer: Option D
Explanation:
No answer description available for this question.
A. Lignite
B. Sub-bituminous
C. Anthracite
D. Peat
A. CO and H2
B. N2 and H2
C. H2, CH4 and CO
D. CO2 and H2
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
[B].
[C].
[D].
Answer: Option B
Explanation:
No answer description available for this question.
A. Boiling
B. Adding Ca(OH)2
C. Boiling it with Na2CO3
D. None of these