You have four test tubes, A, B, C and D containing sodium carbonate, sodium chloride, lime water and blue litmus solutions respectively. Out of these the material of which test tube/ test tubes would be suitable for the correct test of acetic/ethanoic acid?
only A
A and B
B and C
B and C
Mustard oil and calcium hydroxide
Castor oil and calcium hydroxide
Turpentine oil and sodium hydroxide
Turpentine oil and sodium hydroxide
A student took four test tubes P, Q, R and S and filled about 8 mL of distilled water in each. After that he dissolved an equal amount of Na2SO4 in P, K2SO4 in Q, CaSO4 in R and MgSO4 in S. On adding an equal amount of soap solution and shaking each test tube well, a good amount of lather will be obtained in the test tubes,
P and Q
P and R
P, Q and S
P, Q and S
A student while observing an embryo of a gram seed listed various parts of the embryo as listed below :
Testa, Micropyle, Cotyledon, Tegmen, Plumule, Radicle. On examining the list the teacher commented that only three parts are correct. Select these three correct parts :
Cotyledon, Testa, Plumule
Cotyledon, Plumule, Radicle
Cotyledon, Tegmen, Radicle
Cotyledon, Tegmen, Radicle
Select the set of homologous organs from the following:
Wings of pigeon and a butterfly
Wings of bat and a pigeon
Forelimbs of cow, a duck and a lizard
Forelimbs of cow, a duck and a lizard
Three students A, B and C focussed a distant building on a screen with the help of a concave mirror. To determine focal length of the concave mirror they measured the distances as given below:
Student A : From mirror to the screen
Student B : From building to the screen
Student C : From building to the mirror
Who measured the focal length correctly
If you focus the image of a distant object, whose shape is given
below, on a screen using a convex lens,
the shape of the image of this object on the screen would be:
In the following diagram the correctly marked angles are:
∠ A and ∠ e
∠ i, ∠ A and ∠ D
∠ A, ∠ r and ∠ e
∠ A, ∠ r and ∠ e
The correct sequencing of the angle of incidence, the angle of emergence, the angle of refraction and lateral displacement shown in the following diagram by digits 1, 2, 3 and 4 is:
2, 4, 1, 3
2, 1, 4, 3
1, 2, 4, 3
1, 2, 4, 3
Write the molecular formula of first two members of homologous series having functional group –Cl.
First two members of homologous series having functional group –Cl:
a. CH3Cl (Chloromethane)
b. CH3CH2Cl (Chloroethane)