Worksheetsscience chapters
Total questions: 20
Worksheet time: 15mins
Which one of the following properties is not generally exhibited by ionic compounds
Solubility in water
Electrical conductivity in solid state
High melting and boiling points
Electrical conductivity in molten state
Galvanisation is a method of protecting iron from rusting by coating with a thin layer of
Gallium
Aluminium
ZInc
Silver
Stainless steel is very useful material for our life. In stainless steel, iron is mixed with
Ni and Cr
Cu and Cr
Ni and Cu
Cu and Au
If copper is kept open in air, it slowly loses its shining brown surface and gains a green coating. It is due to the formation of
CuSO4
CuCO3
Cu(NO3)2
CuO
Which among the following alloys contain mercury as one of its constituents
Stainless steel
Alnico
Solder
Zinc amalgam
Which of the following metals form an amphoteric oxide?
Na
Ca
Al
Cu
Which of the following can undergo a chemical reaction?
MgSO4 + Fe
ZnSO4 + Fe
MgSO4 + Pb
CuSO4 + Fe
What is the equation for energy transferred in a circuit?
E=IVt
E=tVI
E=tIV
E=IVt
The current through R2 is:
0´2 C
5 A
0´2 A
0´02 A
Two devices are connected between two points say A and B in parallel. The physical quantity that will remain the same between the two points is-
current
voltage
resistance
None of these
The least resistance obtained by using 2 Ω, 4 Ω, 1 Ω and 100 Ω is
< 100 Ω
< 4 Ω
< 1 Ω
> 2 Ω
Calculate the current flows through the 10 Ω resistor in the given circuit.
1.2 A
0.6 A
0.2 A
2.0 A
Two resistors are connected in series gives an equivalent resistance of 10 Ω. When connected in parallel, gives 2.4 Ω. Then the individual resistance are-
each of 5 Ω
6 Ω and 4 Ω
7 Ω and 4 Ω
8 Ω and 2 Ω
If R1 and R2 be the resistance of the filament of 40 W and 60 W respectively operating 220 V, then..
R1 < R2
R2 < R1
R1 = R2
R1 ≥ R2
The brown eye trait is dominant over blue eyes. Which of the following genotypes best represents the phenotype for blue eyes?
BB
Bb
bb
bB
phenotype
refers to the organism's combination of alleles (ex: Aa, AA, aa)
physical characteristics of an individual organism (traits) (ex: blue eyes, brown hair)
allele that is expressed when present
allele that is only expressed when two copies are present
heredity
the passing on of physical or mental characteristics genetically from one generation to another
features or characteristics that are passed on to you - or inherited from your parents
mating of two organisms
pieces of DNA that provide instructions to make certain protein
In peas, yellow pod color is dominant to green pod color. Two heterozygous parents are crossed. What are the chances that the offspring will have green pods?
25%
50%
75%
100%
