1.If the population of a community of rabbits increases by 25% every year where as the population of another community increase by50% per year. If the present population of both communities is same, what is the ratio of population of community B to A in 2 years?
Ans: 1.44
2.Talc is a mineral which is used in the manufacture of soap. The main reason why this mineral is used is
a) it increases the bulk of the product
b) it contains fragrance
c) It has antimicrobial properties
d) it is soft and does not scratch the skin
Which of the following options is correct?
a. C and D
b. A and D
c. B and C
d. A only
Ans: b) A and D
3.which of the following gases causes maximum green house effect?
a) CO2
b) CH4
c) CFC
d) NO2
Ans: CFC
4.100g of inorganic compound contain x.5H2o volatile impurity.Heating the compound
at 150 degree centigrade for 60 minutes it gives residue of 8g.Find the percentage of impurity present in that sample?
a.10 percent
b.8 percent
c.20 percent
d.80 percent
Ans: 20 percent
5.why ice skates can easily slopes down in ice ?
Ans: localized ice melts under the skates
6.If a rope is tied to two poles and is loose and a pencil is attached to it and moved so that rope is tight, the figure drawn by pencil is
a. triangle
b. circle
c. Ellipse
d. Square
Ans: triangle
7.A garden is in the shape of right angled triangle whose angles are in arithmetic progression. The length of the least side is 10m. Find the fencing area.
Ans: 72.36
8.Chromium containing radioactive substance has radioactive decay = 600 disintegrations/sec on 10th day. If half life of the substance is 5 days, what is the radioactivity on 5th day?
Ans: 724
9. if half moon is in the waning phase. Then it is arising from
a) Eastern horizon
b) Western horizon
c) 45 from east
d) 45 degree from West
Ans: a) Eastern horizon
10. In a Mendel cross involving 2 characters, Tall-Dwarf and Red-white, which of the following parental types would give Tall, Red and Dwarf, White progenies in equal ratio. What would be the genotype of parents if F1 progeny with tall red and dwarf white plants in equal ratio?
a) TTRR x ttrr
b) Ttrr x ttrr
c) TtRr x TtRr
d) TtRr x ttrr
Ans: TtRr x ttrr
11. An iron rod on Spring balance showing weight 0.5 Kg, a beaker filled with water on a weighing balance showing weight 3 Kg, then what is the weight when that rod is immersed in beaker partially although hanging on the spring balance?
Ans: 3.47kg