Pranav, a class VII student collected some China rose petals and placed in a beaker. To this he added some warm water, kept it for some time and then he used this coloured water as an indicator. He collected few samples and tested them with China rose indicator. Which of his observations was/were not correct?
Sample Effect on adding China rose indicator
(i) Soap solution Turns green
(ii) Curd No change
(iii) Soft drink Turns dark pink
(iv) Antacid tablet Turns green
A(i) and (ii)
C(ii), (iii) and (iv)
D(i) and (iii)
this question's answer according to the sofolympiad trainer website is option C. the answer given by the website is wrong, isn't it?
On the basis of the given graph select the correct statement.
(A) X shows the amount of pollutants present in water.
(B) Y shows the population of fishes and other fresh water organisms.
(C) Y shows the amount of oxygen dissolved in water.
(D) Y shows the population of bacteria and algae.
Read the following statements.
(i) Hormone A helps a mother to feed her baby as it induces production of milk.
(ii) Hormone B helps to regulate amount of glucose in blood so that body can get energy.
Refer the given figure and select the correct statement regarding the above given hormones.
(A) Gland Z secretes hormone B.
(B) Hormone B can either be insulin or glucagon and is secreted by gland Y.
(C) A is growth hormone (GH) and is secreted by gland X.
(D) Gland Y secretes both the hormones A and B.
When a light ray is reflected repeatedly by a set of parallel plane mirrors, the intensity of light rays decreases after some reflections. This is because of ____.
(A) Poor reflection from mirrors
(B) Absorption of some amount of light by mirrors
(C) Dispersion of light when the rays travel through the atmosphere
(D) Scattering of light by the mirrors
Which of the following statements is false?
AIn a compound, elements are always present in a variable ratio
BElements and compounds are pure substance
CMetalloids show properties of metals as well as non metals
DThe constituents of a mixture do not combine chemically with each other
To me compounds is not pure substance
People living in different states of India, wear different types of clothes, depending on the climate and tradition of the state. Which amongst the following represents the state of India which does not have any coastal areas?
Study the given classification chart. Which item is classified wrongly?
send the detail
The body part which present as pair in human body are
ALung and Heart
BHeart and Fingers
CFingers and Kidney
DKidney and Lung
pl. detail answer send
Which of the following statement is correct?
ASmoke always rises up in the atmosphere because hot air is lighter than cold air.
BSmoke always comes down in the atmosphere because hot air is lighter than cold air.
CSmoke always rises up in the atmosphere because hot air is heavier than cold air.
DSmoke always rises up in the atmosphere because hot air is heavier than cold air.
Answer A is correct but options C and D are repeated.