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Which of the following statements are true about the Silk Route? I. The Silk Route was exclusively used for trading of silk. II. The route also served as a great channel for the transmission of cultures. III. The Silk Route bifurcates into Eastern, Western, Northern and Southern Silk Route. IV. Khotan was one of the most important place on the Southern Silk Route.
Which of the following statements is/ are correct?
1. Uniform silk yarns are more suitable for weaving on high speed looms than hand reeled silk yarns.
2. Reeling or unwinding the filament from the cocoon is done in an establishment called a filature.
3. Doupion silk comes from two silk worms who spin their cocoon together.
4. Reeled silk or Gandhi Ashram silk is a long continuous filament 300-1600 yards in length.
Selects the correct answer
There are two types of detergents – P and Q. Detergent P contains 60% soap and 40% bleach, while Detergent Q contain 82% soap and 18% of bleach. In what ratio should the detergents P and Q be mixed, so that the resultant mixture contains 72% of soap in it?
Read the given statements carefully and answer the questions. Statement: Sunil has only Rs 100. He has to buy a soap, an oil bottle, a kilo of potatoes and a chocolate. Which of the following combinations would Sunil buy? A. An oil bottle of Rs 44, chocolate of Rs 23, soap of Rs 2 and half kg of potatoes of Rs 16. B. An oil bottle of Rs 40, chocolate of Rs 20, soap of Rs 17 and a kg of potatoes for Rs 34. C. Half a kilo potato of Rs 12, soap of Rs 23, chocolate of Rs 5 and an oil bottle of Rs 39. D. Chocolate of Rs 50, soap of Rs 7, an oil bottle of Rs 30 and a kg  of potato of Rs 29 per kg.
The following paragraph is taken from the Class VII science NCERT textbook-Discovery of silk: The exact time of the discovery of silk is perhaps unknown. According to an old Chinese legend, the empress Si-lung-Chi was asked by the emperor Huang-ti to find the cause of the damaged leaves of mulberry trees growing in their garden. The empress found white worms eating up mulberry leaves. She also noticed that they were spinning shiny cocoons around them. Accidentally a cocoon dropped into her cup of tea and a tangle of delicate threads separated from the cocoon. The silk industry began in China and was kept a closely guarded secret for hundreds of years. Later on, traders and travelers introduced silk to other countries. The route they traveled is still called the 'silk route'. What is the purpose of including the above in a science textbook?  a. to develop a historical perspective. b. to develop an appreciation of how incidents/ideas give rise to the discovery of new things. c. to develop a holistic understanding of science d. to make science textbooks light as the above is just for information and not for testing
A 60% spirit solution is mixed with r% spirit solution in the ratio 1 : 3 such that a s% spirit solution is obtained. When a (s/3)% spirit solution is mixed with 55% spirit solution in equal ratio, an (r/2)% spirit solution is obtained. Which of the following can be determined? (A) Value of ‘r’ (B) Value of ‘s’ (C) Volume of the 60% spirit solution mixed initially (D) If 9 liters of r% spirit solution was mixed initially, what was the volume of the s% spirit solution thus obtained?
Read the instructions below and answer the questions that follow: P * Q means “some P are Q”. P – Q means “all P are Q”. P + Q means “no P is Q”. Now, statements below are followed by two conclusions. You have to take the given statements to be true even if they seem to be at variance from commonly known facts. Read all the conclusions and then decide which of the given conclusions logically follows from the given statements disregarding commonly known facts. Statements: Ant * hall Hall * soap Soap + dog Dog * doll Conclusions: I. Ant * soap II. Soap + doll
A chemical solution appears green when the salt concentration is 8 grams per litre (gpl) and red when it is 10 gpl. Pure water was added to the solution of 1 litre of 15 gpl solution till it turned green. Then 125 ml of the green solution is taken out and x grams of salt is added to the green solution to make it red. Another 500 ml of the final solution was taken out and y litres of green solution is added to get a resultant solution of concentration 9.6 gpl.  Assume adding salt doesn’t change its volume and find the ratio of x and y. 
In order to determine acidic, basic or neutral character of solutions, a student tabulated the following results after experimentation. Which of the following observations has been tabulated correctly? Case Test Solution Colour change on red litmus paper Colour change on blue litmus paper Acidic/Basic/Neutral A NaOH No change Red Acidic B Sour Milk Blue No change Neutral C Vinegar No change No change Neutral D Washing soda Blue No change Basic
In order to determine acidic, basic or neutral character of solutions, a student tabulated the following results after experimentation. Which of the following observations has been tabulated correctly? Case Test Solution Colour change on red litmus paper Colour change on blue litmus paper Acidic/Basic/Neutral A NaCl No change Red Acidic B Lime water Blue No change Neutral C Vinegar No change No change Neutral D Washing soda Blue No change Basic