Today, we are providing you the Science Questions, which help you to command over this subjects.Taught many interesting science facts and information and add some fun in a science teaching learning process.This section is not only important for CTET exam but also for other TET Exam i.e UPTET, PTET, REET, KVS,DSSSB Exam etc. So, we will provide you the questions which will help you in preparing for Exam.
Q2. Which of the following is/are true when milk changes into curd?
I. It changes colour.
II. The change cannot be reserved.
III. It changes taste.
IV. Its state is changed from liquid to semi solid.
Choose the correct option from below.
(a) Only I
(b) I and II
(c) II, III and IV
(d) All of these
Q3. Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water added to dissolve it (step I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and Step II are
(a) physical and chemical changes, respectively.
(b) chemical and physical changes, respectively.
(c) Both physical change
(d) Both chemical change
Q4. Identify the correct statements.
I. The freezing of water into ice is a chemical change.
II. The changes occur inside the molecular composition is a chemical change.
III. A new substance is obtained in a chemical change.
IV. The change in shape, size and state is a chemical change.
Which of the statements given about are correct?
(a) I, II and III
(b) II and III
(c) I and II
(d) I and IV
Q5. Consider the following statements and choose the correct option.
Which of the statement(s) given above are correct?
I. Conversion of blue copper sulphate to black cupric oxide on heating is a physical change.
II. A change in which chemical composition does not change is called physical change.
(a) Both statements I and II are false
(b) Statement I is correct but statement II is false
(c) Statement II is correct but statement I is false
(d) Both statements I and II are correct
Q6. Iodine can be separated from a mixture of iodine and potassium chloride by which of the following method?
(a) Sedimentation
(b) Filtration
(c) Sublimation
(d) Distillation
Q8. 100 mL solvent is available to do an extraction. Which give a better separation?
(a) Single extraction with 100 mL
(b) Two extractions with 50 mL
(c) Five extractions with 20 mL
(d) One extraction with 40 mL and two with 30 mL
Q9. Steam distillation is based on the fact that vaporization of organic liquid takes place at
(a) lower temperature than its boiling point
(b) higher temperature than its boiling point
(c) its boiling point
(d) water and organic liquid both undergo distillation
Q10. Fractional crystallisations is carried out to separate a mixture of
(a) organic solids mixed with inorganic solids
(b) organic solids slightly soluble in water
(c) organic solids having small difference in their solubilities in suitable solvent
(d) organic solids having great difference in their solubilities in suitable solvent
Solutions
S1. Ans.(a)
Sol.
S2. Ans.(d)
Sol.
S3. Ans.(b)
Sol.
S4. Ans.(b)
Sol.
S5. Ans.(c)
Sol.
S6. Ans.(c)
Sol.
S7. Ans.(b)
Sol.
S8. Ans.(c)
Sol.
S9. Ans.(a)
Sol.
S10. Ans.(d)
Sol.
