English Medium कक्षा १० - CBSE Important Questions

निम्नलिखित गद्यांश को ध्यानपूर्वक पढ़कर इस पर आधारित प्रश्नों के सर्वाधिक वाले विकल्प चुनकर लिखिए।

1. निम्नलिखित कथन तथा कारण को ध्यानपूर्वक पढ़िए। उसके बाद दिए गए विकल्प में से कोई एक सही विकल्पों चुनकर लिखिए।    [1]   
   
   कथन: सफलता के मद में हमें अपने से आगे दिखना ही बंद हो जाता है।
   कारण: हम अति आत्मविश्वास के शिकार होकर जरूरी मेहनत नहीं करते।
   1. कथन तथा कारण दोनों गलत हैं।
   2. कथन गलत हैं लेकिन कारण सही है।
   3. कथन सही है लेकिन कारण उसकी गलत व्याख्या करता है।
   4. कथन तथा कारण दोनों सही हैं तथा कारण, कथन की सही व्याख्या करता है।
2. सफलता प्राप्ति के बाद किसे अपने नियंत्रण में रखना आवश्यक है?   [1] 
   1.  दूसरों के प्रति अपने व्यवहार को
   2.  अहंकार और आक्रोश की इच्छा को
   3. आत्मविश्वास और जीत की खुशी को
   4.  अपने प्रति दूसरों के व्यवहार को
3. बिल गेट्स के अनुसार सफलता की खुशी मनाने से अधिक आवश्यक है:   [1] 
   1. असफलताओं की चुनौतियों को स्वीकारना
   2. असफलताओं के कारणों पर ध्यान देना
   3.  नए लक्ष्य के लिए संघर्ष करना
   4. असफलताओं से शिक्षा ग्रहण करना
4. 'किसी एक हार से सब खत्म नहीं हो जाता' - पंक्ति का आशय है:    [1] 
   1. जीत-हार जीवन के दिन और रात हैं।
   2. असफल होने से जीवन समाप्त नहीं होता।
   3. हार के बाद जीत अवश्य आती है।
   4. लक्ष्य प्राप्ति के लिए संघर्ष करना चाहिए।

5. प्रज्ञाननंदा की प्रसिद्धि का कारण है:     [1] 

   1. कम उम्र में शतरंज के क्षेत्र में नाम कमाना
   2. उनकी सादगी, सरलता और शालीनता
   3. हार-जीत को समान भाव से स्वीकारना
   4. जीवन को चुनौती के रूप में स्वीकरना

If α and β are the zeroes of the polynomial x² – 1, then the value of (α + β) is ______.

Find the value of p, for which one root of the quadratic equation px² – 14x + 8 = 0 is 6 times the other.

Assertion (A): The point (0, 4) lies on y-axis.

Reason (R): The x-coordinate of a point on y-axis is zero.

Prove that `tan θ/(1 - cot θ) + cot θ/(1 - tanθ)` = 1 + sec θ cosec θ

What are alloys?

For preparing soap in the laboratory we require an oil and a base. Which of the following combinations of an oil and a base would be best suited for the preparation of soap?

(a) Castor oil and calcium hydroxide

(b) Turpentine oil and sodium hydroxide

(c) Castor oil and sodium hydroxide

(d) Mustard oil and calcium hydroxide

Write the molecular formula of two consecutive members of homologous series of aldehydes. State which part of these compounds determines their

1. physical and 
2. chemical properties

State the reason to explain why covalent compounds "are bad conductors of electricity".

Complete the following chemical equation:

\[\ce{CH3COOC2H5 + NaOH ->}\]

Complete the following chemical equations : C₂H₅OH + Na →

The following vegetables are kept in a basket :

Potato, Tomato, Radish, Brinjal, Carrot, Bottle-gourd

Which two of these vegetables correctly represent the homologous structures?

(A) Carrot and Tomato

(B) Potato and Brinjal

(C) Radish and Carrot

(D) Radish and Bottle-gourd

What happens when a small piece of sodium is dropped in ethanol? Write the equation for this reaction.

How does fertilisation occur in flowers? Name the parts of the flower that develop into (i) seed, and (ii) fruit after fertilisation.

Draw a ray diagram to show the dispersion of white light.

State the cause of dispersion of white light

Three incandescent bulbs of 100 W each are connected in series in an electric circuit. In another circuit another set of three bulbs of the same wattage are connected in parallel to the same source.

1. Will the bulb in the two circuits glow with the same brightness? Justify your answer.
2. Now let one bulb in both the circuits get fused. Will the rest of the bulbs continue to glow in each circuit? Give reason.

A student was asked to perform an experiment to study the force on a current carrying conductor in a magnetic field. He took a small aluminium rod AB, a strong horse shoe magnet, some connecting wires, a battery and a switch and connected them as shown. He observed that on passing current, the rod gets displaced. On reversing the direction of current, the direction of displacement also gets reversed. On the basis of your understanding of this phenomenon, answer the following questions: 

1. Why does the rod get displaced on passing current through it?
2. State the rule that determines the direction of the force on the conductor AB.
3. 1. If the U-shaped magnet is held vertically and the aluminium rod is suspended horizontally with its end B towards due north, then on passing current through the rod from B to A as shown, in which direction will the rod be displaced?
   2. Name any two devices that use current carrying conductors and magnetic fields.

OR

Draw the pattern of magnetic field lines produced around a current carrying straight conductor held vertically on a horizontal cardboard. Indicate the direction of the field lines as well as the direction of current flowing through the conductor.

"Energy flow in a food chain is unidirectional" Justify this statement.