NEW
Font size
WorksheetsScience 1
Total questions: 16
Worksheet time: 8mins
The number of electrons in the outermost shell of alkali metals is..... /क्षार धातुओं के सबसे बाहरी कोश में इलेक्ट्रॉनों की संख्या होती है
1
2
3
7
During Newlands time ....... Elements were known
/न्यूलैंड्स काल के दौरान...... तत्वों को जाना जाता था
56
65
63
36
Magnesium burns in air to produce....../
मैग्नीशियम पैदा करने के लिए हवा में जलता है
Mg(OH)2
MgO
MgO2
MgCl2
The device used for measuring a current is .../
करंट मापने के लिए प्रयुक्त उपकरण है
A Voltmeter
An Ammeter
.......... Is a metal/
........ धातु है
Mg
S
P
Br
... Is a nonmetal./
.......अधातु है
Au
Hg
Br
Cu
....Prevent the rusting of iron./
....लोहे को जंग लगने से रोकें
Copper
Zinc
Aluminium
Silver
Magnesium reacts with con.HCl to form ............. salt.
Copper chloride
Ferrous chloride
Calcium cloride
Magnesium cloride
At the time of short circuit, the current in the circuit.........
Increases
Decreases
Remains the same
None of above
The density of water is maximum at ......
- 4°C
0°C
100°C
4°C
When ice melts, it's volume.......
Increases
Decreases
Remains constant
Both A and B
Dobereiner : Triads : : Newlands : ?
Table
Octave
Elements
Atomic Number of Nitrogen.......
5
6
8
None of above
....... Is the general formula of alkane.
C2H2n-2
C2H2n
C2H2n+2
C7H16 is ..........
Heptane
Hexane
Methane
Ethane
......... Is used to prepare carbon black.
Methane
Ethane
Propane
Butane
